Develop Bugs

Marshmallow update caused bootloop

Hi all,
Just got news of the marshmallow being available to my LG G4 (H815). I was aware of the update having been rolled out to Poland and Korea before so I thought it was a safe bet.
I plugged in my phone, started the LG Bridge software which prompted me with the update. I went on and downloaded it, which happened without any issues.
However, when the process was over and my phone restarted, it went through the usual "app optimization" window and after that started boot-looping. I have the initial audio cue from LG playing every few minutes, with the same "app optimization" for 12 apps (when the first time it was around 90).
I initially left it for a while (5-10min) before i started losing patience. I removed the battery but that didn't change anything.
I initiated the Recovery mode, but it prompted me with a "factory reset" question, which I didn't feel like doing before having tried anything else.
My phone is not rooted and was running Android 5.1, the LG variant. I never fiddled with this phone.
Has anyone else experienced issues updating? Do you have any suggestions on what I can do to recover my data? Because for me, that's mostly what I'm concerned of.
Thanks!
Edit: In addition, I'm facing a new problem... while boot-looping, my phone is actually draining more energy from the battery than my charger can provide (yet, it's a 1,8A @ 5V).
It's now down to 10%, which I've been able to verify by removing the battery thus shutting down the phone, putting the battery back inside, and plugging the phone in while being off. However, this automatically turns on the phone, so it briefly displays the battery charging animation before booting... My phone was at 100% during the Marshmallow update.

Which S/N (serial number on your box) do you have? 505 and 506 are known for this issues..

appileh said:
Which S/N (serial number on your box) do you have? 505 and 506 are known for this issues..
Click to expand...
Click to collapse
Wow, wasn't aware of that... it turns out it's a 505...

Wh!teSh4dow said:
Wow, wasn't aware of that... it turns out it's a 505...
Click to expand...
Click to collapse
yes it can be a issue of the 505.. Not to scare you or anybody else (there are people here that are crying and closing threads because i talk things like this.) But 505 is a known issue that some of the motherboards have defects. I hope you can fix it for yourself or call the cheap manufacturer LG..

appileh said:
yes it can be a issue of the 505.. Not to scare you or anybody else (there are people here that are crying and closing threads because i talk things like this.) But 505 is a known issue that some of the motherboards have defects. I hope you can fix it for yourself or call the cheap manufacturer LG..
Click to expand...
Click to collapse
Are you aware of this being a reason for replacement units to be issued? I didn't buy it through LG directly but through amazon, so I'll get in touch with them, but just wanted to know if you've had any experience or know of anything regarding this. And thanks for letting me know.

Wh!teSh4dow said:
Are you aware of this being a reason for replacement units to be issued? I didn't buy it through LG directly but through amazon, so I'll get in touch with them, but just wanted to know if you've had any experience or know of anything regarding this. And thanks for letting me know.
Click to expand...
Click to collapse
Np chief. They will fix your phone, just say it is in a bootloop after LG's official update. Call Amazon or LG itself to fixe this problem. (you mentioned you didnt root anything etc so you are good to go boss).

appileh said:
Np chief. They will fix your phone, just say it is in a bootloop after LG's official update. Call Amazon or LG itself to fixe this problem. (you mentioned you didnt root anything etc so you are good to go boss).
Click to expand...
Click to collapse
I figured, they would just try to restore my device and send it back to me, so I tried it and it worked. I'm still disapointed for two reasons:
- I still lost valuable data which I can't retrieve any more
- I'm still stuck with my device which could very well be prone to other issues in the future (any future update ?)

There are issues with this phone because i had 3 Rma's because of motherboard and dead pixels. My wife has also dead pixel and has version 506. Just use your phone, Marshmallow update is out so maybe they changed something in the system to stabilize the motherboard.
Verstuurd vanaf mijn LG-D855 met Tapatalk

LG G4 stuck in bootloop

Hi XDA,
This morning I was just browsing Reddit when my phone suddenly shut down. When I tried to restart it I found that it was stuck in a bootloop.
I can only seem to get into download mode. Hard reset just doesn't seem to be working. Maybe I'm doing it wrong, maybe it's broken, I'm not sure. I was running the low effort root, and hadn't modified anything recently. Using the 2014 flash tool just gives me a "Connection to server failed. Try again in a moment" error.
Does anyone have any idea how I can fix it?
Edit:
THE ONLY KNOWN FIX IS TO RMA AND THERE DOES NOT SEEM TO BE A WAY TO RECOVER YOUR DATA
For some more information, the issue appears to be purely hardware based, and based on this thread seems to have primarily occured in the last months. Our phones randomly died during regular usage, then most users reported that rebooting it showed the "optimizing apps" thing (I personally did not see this) and then it rebooted again and went into a bootloop. Reinstalling the software often succeeds but doesn't actually fix anything, as your phone will just start looping again (still worth a try though, maybe you have some other unfortunate issue?). I myself and multiple users have tried the following things (text stolen from @dentralp because he wrote it up in such a good way):
Attempted Fixes:
1) Tried using LG bridge
-it says its updating to marshmallow (succeeds)
-then sits at LG boot screen without looping
2) Flashtool 2014 - Europe OPEN H81510D.kdz
-said that it couldn't connect to server
-clicked ok
-clicked retry
-says S/W update in progress
-stopped due to an error
-This is on my main PC, had issues with Flashtool before, will check on my laptop and feed back
-Fails on 9%
3) LGUP
-Only see's my device when I enter download mode
-Says my device is unknown so won't do anything with it
-Restarted Computer
-Wants a .tot not .kdz, contrary to the guide posted - out my depth, whats the difference between a kdz and a tot?
-Click on upgrade
-Chose Europe OPEN H81510D.kdz
-Close and reopen LGUP
-Making sure Refurbish is chosen (kdz should still be active file)
-Click Start
-80% Reboots, Reboots, reboots, reboots...
-100% "Click here to continue" on computer
-Reboot
-Bootloop
4) Longshot
-now I assume that I'm back on lp, moving back to step 2 Flashtool 2014
-Connection to server failed
-ignored
-seconds later it starts flashing
-Bootloop
5) LGUP
-Same as 3 above, but with MM H81520a_00.kdz
-Complete
-Bootloop
-repeated to go back to Europe OPEN H81510D.kdz
edit 26-1-2016
LG finally recognized the issue. They state that the problem is a loose connector. Article here: http://www.androidauthority.com/lg-admits-g4-bootloop-problem-hardware-fault-669603/
As far as I can tell, the issue is not restricted to certain phones, but primarily phones with serial 505xxxxxxxxxxx appear to be victim to this.
UPDATE: PEOPLE ARE CLAIMING THERE IS A WAY TO SAVE YOUR DATA
People are claiming that you can save your phone and recover your data by disabling the Big core. This means disabling everything that makes your phone fast. It may be a good way to recover your data if it's critical, but I would not recommend it as a real permanent fix, since it does make your phone a lot slower (a phone has 4 little cores and 4 big cores, the little ones are very energy efficient but slow, and the big cores are fast but not efficient). I don't have a clue whether this voids your warranty or not, and I've not seen many people confirm that it's working either, but it's worth a try! More information on the comment by gabriel713281 here and in the reddit thread here.

same here... +1

kartalgurhan said:
same here... +1
Click to expand...
Click to collapse
That is strange. Also since the last, lets say, 24 hours?

Same thing happened to me. That seems super odd. Mine randomly restarted last night and stuck in Boot loop. Havent had any issues whatsoever before this

verluci said:
Hi XDA,
This morning I was just browsing Reddit when my phone suddenly shut down. When I tried to restart it I found that it was stuck in a bootloop.
I can only seem to get into download mode. Hard reset just doesn't seem to be working. Maybe I'm doing it wrong, maybe it's broken, I'm not sure. I was running the low effort root, and hadn't modified anything recently. Using the 2014 flash tool just gives me a "Connection to server failed. Try again in a moment" error.
Does anyone have any idea how I can fix it?
Click to expand...
Click to collapse
Hey there! You could go back to stock and fully wipe your phone using this method. Should work.
If the problem still remains I'd believe it's a hardware related problem. Hit thanks if it worked for you

verluci said:
That is strange. Also since the last, lets say, 24 hours?
Click to expand...
Click to collapse
Yes, exactly 14 hours ago. ..

Same happened to me, I got dual Sim lg g4, rooted, I remove the SD and restart. Try it.

verluci said:
Hi XDA,
This morning I was just browsing Reddit when my phone suddenly shut down. When I tried to restart it I found that it was stuck in a bootloop.
I can only seem to get into download mode. Hard reset just doesn't seem to be working. Maybe I'm doing it wrong, maybe it's broken, I'm not sure. I was running the low effort root, and hadn't modified anything recently. Using the 2014 flash tool just gives me a "Connection to server failed. Try again in a moment" error.
Does anyone have any idea how I can fix it?
Click to expand...
Click to collapse
When you get the ''connection to server failed'' error, just wait. it actually flashes but for some reason you get that error.

Hey, same thing happened to me. Went to my carrier the day after because I have warranty there. It ended up in them replacing the circuit board, now my phone wasn't rooted but it was in a bootloop and it just wouldn't start. We may not have the same problem but it could be so.

jobw96 said:
When you get the ''connection to server failed'' error, just wait. it actually flashes but for some reason you get that error.
Click to expand...
Click to collapse
How long would I have to wait? After how long would I have known that it did actually fail? Or should I just leave it for a while and guess? If I remember correctly it actually reset the installing percentage as well, but don't quote me on that quite yet (I'll try again overnight or tomorrow morning).

Same issue today. Anyone got any idea what's going on?

Everyone with bootloop please write down model, operator and more importantly the initial three digits of their serial number (or production date from "Lg phone from" app in play store)

verluci said:
How long would I have to wait? After how long would I have known that it did actually fail? Or should I just leave it for a while and guess? If I remember correctly it actually reset the installing percentage as well, but don't quote me on that quite yet (I'll try again overnight or tomorrow morning).
Click to expand...
Click to collapse
well, i don't rember how long it took when i tried it, i just left it at that error message and it worked after quite some time.

H815EU - unlocked bootloader / TWRP / Root
Last Update: 10/03/2015 - END OF THE SAGA
Solution 1 (Clean Software): RMA to LG or place of purchase
Solution 2 (Modified Software - within 6 months - UK): Return to retailer
Solution 3 (Modified Software - UK): Return to LG
Solution 4 (Modified Software - after 6 months): Find some paper to weigh down
Solution 5 (General): Don't buy LG's Hardware - quality control is questionable at best
The Journey
Although some people have reported getting some functionality back, no such luck for myself and majority of others.
What I didn't try
-Flashing MM20b - any method
-Flashing MM20c - any method
in fact, not even checked that they exists (no phone, lg has it!)
Don't think it was about when I was trying to recover (?) - I also highly doubt that flashing these will help you
Click to expand...
Click to collapse
Lost all hope? no chance of RMA? want your data back?
Possible 24 hour fixes for data retrieval
http://forum.xda-developers.com/g4/help/diy-h815-usa-variant-hardware-boot-loop-t3311623
Click to expand...
Click to collapse
Attempted fixes. Pre-warning, this is my journey starting 12th December and is raw (includes thoughts and mistakes).
12/12/2015
+1
12 hours ago while sending a text my phone restarted. I logged back in to write the text again, it restarted then bootlooped.
H815EU
unlocked bootloader
TWRP
Root
S/N 506xxx
Attempted Fixes
1) Tried using LG bridge
-it says its updating to marshmallow (succeeds)
-then sits at LG boot screen without looping
Click to expand...
Click to collapse
2) Flashtool 2014 - Europe OPEN H81510D.kdz
-said that it couldn't connect to server
-clicked ok
-clicked retry
-says S/W update in progress
-stopped due to an error
-This is on my main PC, had issues with Flashtool before, will check on my laptop and feed back
-Fails on 9%
Click to expand...
Click to collapse
3) LGUP
-Only see's my device when I enter download mode
-Says my device is unknown so won't do anything with it
-Restarted Computer
-Wants a .tot not .kdz, contrary to the guide posted - out my depth, whats the difference between a kdz and a tot?
-Click on upgrade
-Chose Europe OPEN H81510D.kdz
-Close and reopen LGUP
-Making sure Refurbish is chosen (kdz should still be active file)
-Click Start
-80% Reboots, Reboots, reboots, reboots...
-100% "Click here to continue" on computer
-Reboot
-Bootloop
Click to expand...
Click to collapse
4) Longshot
-now I assume that I'm back on lp, moving back to step 2 Flashtool 2014
-Connection to server failed
-ignored
-seconds later it starts flashing
-Bootloop
Click to expand...
Click to collapse
5) LGUP
-Same as 3 above, but with MM H81520a_00.kdz
-Complete
-Bootloop
-repeated to go back to Europe OPEN H81510D.kdz
Click to expand...
Click to collapse
12/12/2015
-I assume that in the uk the MM update was rolled out for the carrier free G4 and my phone chewed it up and then choked on it
-If someone figures it out let me know, otherwise its time for a new phone :/
-apparently you can use adb while LGUP is connected, might try it at some point, had enough for a couple hours
Click to expand...
Click to collapse
Click to expand...
Click to collapse
Attempted RMA
15/12/2015
Carrier quickly give me a reference to send the phone back to them
@nashant recommended LG customer services (for those of us in the UK). Straight to LG, better option than via CarrierI feel.
0344 847 5454
http://www.lg.com/uk/support
Customer support were brilliant DPD out tomorrow to collect my phone. I will update as necessary. Take down your imei before sending it off
Click to expand...
Click to collapse
17/12/2015
DPD have collected my mobile. Fingers crossed!
Click to expand...
Click to collapse
22/12/2015
At the repair centre since 18/12/15 awaiting repair
Click to expand...
Click to collapse
04/01/2016
LG phones helpline is really busy - offering callbacks. I got one, they lost my phone :/
Click to expand...
Click to collapse
05/01/2016
Turns out LG are that busy with returned phones at the moment, warranty repairs are being sent to none warranty repair centres - mine is at SV (?) - This is why they couldn't find my phone. Make sure that you take down your imei number before you send it off, seems this is how they track phones internally, not by your reference number. I am assured that SV (?) are going to do a fantastic job and I should get my phone back next Monday.
Click to expand...
Click to collapse
11/01/2016
LG haven't had an update from the repair centre... they are chasing it and will get back to me by Weds/Thursday.
Interesting part of the conversation, the person on the phone had said to me
Agent "Do you know its gone to the out of warranty repair centre.."
Me "Yes, I was told that it was so busy that they had to but I would get same quality repair"
I am hoping this isn't because of an unlocked bootloader, especially with the issue being duff hardware. Although this hasn't even been mentioned so far.... Starting to worry now. My house is full of LG electronics but I might not be using them again... !
Click to expand...
Click to collapse
14/01/2016
LG have refused the repair
I now have a fairly expensive paperweight and will never buy anything from LG electronics again, that annoyed I might even get rid of the tv and home cinema, seems a good time to upgrade to 4k anyway
Been bouncing back to carrier all day re the consumer rights act in England and the EU directive. They seem to think as a retailer that they have no responsibility.
Which is a UK Consumer champion with extended rights, it discusses the Consumer Rights Act at that link.
"If you discover the fault within the first six months from delivery, it is presumed to have been there from the time of delivery - unless the retailer can prove otherwise."
Click to expand...
Click to collapse
Click to expand...
Click to collapse
The Solutions
Solution 2
After 3 months saying the same thing and not leaving them alone, raising complaints about there complaints handling, contacting the Citezins advice, contacting which and reminding my carrier that;
the Sale of Goods Act 1979 (amended) protects me in this case OUTSIDE manufacturer warranty and that you are not only liable but have a legal responsibility due to the goods being of unsatisfactory quality and unfit for purpose.
Click to expand...
Click to collapse
My carrier eventually offered me a replacement phone, a Samsung Galaxy S6 Edge.
Solution 3
It seems that if you refuse to let them bully you and you remind them of the text on THEIR OWN website;
Once your phone is unlocked, it will no longer be covered by LG warranty.
As we cannot guarantee the proper operation of our hardware with custom software, we are not able to maintain the full scope of warranty for your device after you have unlocked the bootloader.
Because of that we have a responsibility to let you know that defects which may result from, or were caused by custom device-software may not be covered by LG warranty.
Click to expand...
Click to collapse
That they eventually offer to fix your phone;
Ok, here goes.
1) SBE suck major ass - don't even try to talk to them
2) NEVER stop emailing, if they say the case is closed, open a new one while copying in your old one (both to the same cic email, but nevermind it harasses them)
3) Remember, YOU ARE in the right, articulate it.
4) If you unlocked with their bootloader, you did so by the terms on their website. When doing so it DID NOT warn you that you would lose warranty for pre existing hardware faults, only that failure due to SOFTWARE may break warranty. With this your warranty is in fact 100% in tact and as warranty is a legal intent they are obliged to fix your phone. If you had been warned that warranty would IN FACT be broken, even for unrelated issues, you would never have unlocked the bootloader. The FACT remains that LG is not acting upon ITS OWN guidance, this is a PRE EXISTING issue and they MUST fix or replace. - I have NO legal experience, but I know companies will try to fob you off to make you back down. If you are in the right, keep at them, bring in more people to the mix, make life AS HARD as possible for them.
5) Word it better than I did in my emails below, I was a little bit annoyed writing them and they were often drafted on a Lumia 930
6) This is the end of a back and forth and what I personally believe turned the tide;
These emails are from the email thread, therefore read them the BOTTOM ONE FIRST
Me,
After lengthy discussions with our upper management team and senior technician we have decided to repair the boot loop issue on your device as a gesture of goodwill. Please note that this offer is for the boot loop issue only and you handset will not carry any further warranty with LG after the repair is complete.
If you wish to accept this offer please reply with the date (Mon-Fri) and the UK address (we currently have [address] on your file) that you would like the phone collecting from and I would be happy to arrange this for you.
Kind regards
RE
Team Leader
Resolutions team
Click to expand...
Click to collapse
!!!!! After the email below, he copied in his boss, then I got the email above. Don't think he realises I got that part of the email trail, I haven't got the email or I would give it, only a name !!!!
From: ME
Sent: 17
To: uk svcadmin//LGEUN SVC - CRM([email protected]); cic uk//LGEUN SVC([email protected])
Subject: RE: response to complaint
No you haven’t, you entirely ignored my email again. Please explain the excerpts from your website, I will include the full quote;
“Once your phone is unlocked, it will no longer be covered by LG warranty.
As we cannot guarantee the proper operation of our hardware with custom software, we are not able to maintain the full scope of warranty for your device after you have unlocked the bootloader.
Because of that we have a responsibility to let you know that defects which may result from, or were caused by custom device-software may not be covered by LG warranty."
Your quote is from a title, the contents and description of the terms are then spoken about in the section below it. You are referencing my reference cylindrically and it only enforces my point.
If you can’t answer the simple questions I would like you to put me on to someone who can.
Also, define developer. My bsc hons is in computing and I have worked with Linux since redhat. I fully understand hardware and software and for one effects the other which is why i am so upset about the crap hardware you made.
Sent from Outlook Mail for Windows 10 phone
Click to expand...
Click to collapse
From: uk svcadmin
Sent: 17
To: ME
Subject: RE: response to complaint
Dear Mr ME,
In answer to your question regarding the official LG website which allowed you to unlock your device, it clearly states at the top of the page “"Once your phone is unlocked, it will no longer be covered by LG warranty". As you can see this statement is very clear and there are no stipulations or exemptions to this rule. Just to clarify when we say “it will no longer be covered by LG warranty" this means for any and all faults including faults that are unrelated to the bootloader being unlocked.
It also clearly states at the top of the page "Please be advised that this feature is intended for developers only" therefore if you are not a developer you have ignored a clear warning which is there for your own protection.
I hope I have clearly explained our position to you and the matter can now be closed. I understand that you are disappointed with our decision and am genuinely sorry that we have not been able to come to a more mutually agreeable conclusion.
Kind regards
RE
Team leader
LG Resolutions Team
LG Electronics UK Helpdesk
Click to expand...
Click to collapse
From: ME
Sent: 16
To: uk svcadmin//LGEUN SVC - CRM([email protected])
Subject: Re: response to complaint
I appreciate that but you have entirely ignored my last email and the wording of your own website.
Please comment in reference to the quotes from your website.
If these are indeed wrong on therefore misleading they need removing from YOUR website.
As you can see, I followed a process provided by LG. Any issue that arose was not in relation to this and therefore by the wording of your own website, your own process, my warranty is IN FACT still in tact.
If you can't answer my questions I would like this escalated to someone who can.
Click to expand...
Click to collapse
From: uk svcadmin <[email protected]>
Sent: 16
To: ME
Subject: RE: response to complaint
Dear mE,
I am sorry to hear of the problems you have experienced with your G4 and for any inconvenience caused. Whilst I do appreciate your comments and the disappointment caused by our decision I feel I have explained the reasons behind our decision at length on several occasions and as such I am not able to offer you any further assistance.
Please note that we at LG take all complaints very seriously and also accept that mistakes will be made and that we will occasionally fall below our service standards. Therefore your feedback is very important to us. This allows LG to identify areas to make further improvements to our services. Your complaint has been officially logged.
Kind regards
RE
Team leader
LG Resolutions Team
LG Electronics UK Helpdesk
Click to expand...
Click to collapse
From: mE
Sent: 15
To: uk svcadmin//LGEUN SVC - CRM([email protected]); cic uk//LGEUN SVC([email protected])
Subject: Re: response to complaint
You should chose your words more wisely.
"unauthorised alterations "
The alterations were not unauthorised, in fact, they were enabled by LGE and was only possible due to LGE emailing me with an unlocked bootloader to flash.
http://developer.lge.com/resource/mobile/RetrieveBootloader.dev?categoryTypeCode=ANRS
"As we cannot guarantee the proper operation of our hardware with custom software, we are not able to maintain the full scope of warranty for your device after you have unlocked the bootloader.
Because of that we have a responsibility to let you know that defects which may result from, or were caused by custom device-software may not be covered by LG warranty."
THIS WAS NOT A DEFECT THAT RESULTED FROM CUSTOM DEVICE SOFTWARE.
Wording - MAY NOT BE COVERED BY LG WARRANTY.
This clearly leaves open that some warranty would be honoured, like catastrophic failure in the manufacture process. This clearly suggested that my hardware warranty is in fact in tact.
YOU provided me with a way to unlock my phone
YOU provided me with the software to do so
YOU provided the disclaimer leaving open the question about warranty
"LG will not be responsible for the damages caused by any custom software being flashed to your phone."
Custom software DID NOT cause damage to my phone
IF YOUR DISCLAIMER HAD STATED OUT RIGHT THAT AN UNLOCKED BOOTLOADER WOULD FULLY VOID WARRANTY I WOULDNT HAVE DONE IT. AS IT HAPPENS, NOTHING RELATED TO THE UNLOCK BROKE MY PHONE. YOUR MANUFACTURING DID.
Please read your OWN disclaimers, I 100% find YOU at fault for this.
It is only reasonable that you fix my phone - based on;
your website
your disclaimer
Click to expand...
Click to collapse
Conclusion
The choice of a free Samsung Galaxy S6 Edge from my carrier or have my LG G4 fixed by LG
Click to expand...
Click to collapse
I am Hopeful that everything else will be smooth. +rep to @nashant for the recommendation re LG customer services.
Happy bunny after almost 5 months fighting. Here's a potato...
dentralp

Sorry, I should have added that I have the H815 10D.
I have the same results as the commentor above me. Only with LGUP it succeeds and then just keeps looping anyway.

dentralp said:
+1
12 hours ago
H815EU - unlocked bootloader / TWRP / Root
Last Update: 14/01/2015 - LG refused warranty repair due to the device being rooted
Solution (Clean Software): RMA to LG or place of purchase
Solution (Modified Software): Find some paper to weigh down
Solution (General): Don't buy LG's Hardware - quality control is questionable at best
Although some people have reported getting some functionality back, no such luck for myself and majority of others.
What I didn't try;
-Flashing MM20b - any method
-Flashing MM20c - any method
in fact, not even checked that they exists (no phone, lg has it!)
Don't think it was about when I was trying to recover (?) - I also highly doubt that flashing these will help you
Click to expand...
Click to collapse
Click the show content button to see what was tried and updates on the RMA. Pre-warning, this is my journey starting 12th December and is all condensed to 1 post.
12/12/2015
+1
12 hours ago while sending a text my phone restarted. I logged back in to write the text again, it restarted then bootlooped.
H815EU
unlocked bootloader
TWRP
Root
S/N 506xxx
Click to expand...
Click to collapse
Attempted Fixes:
1) Tried using LG bridge
-it says its updating to marshmallow (succeeds)
-then sits at LG boot screen without looping
Click to expand...
Click to collapse
2) Flashtool 2014 - Europe OPEN H81510D.kdz
-said that it couldn't connect to server
-clicked ok
-clicked retry
-says S/W update in progress
-stopped due to an error
-This is on my main PC, had issues with Flashtool before, will check on my laptop and feed back
-Fails on 9%
Click to expand...
Click to collapse
3) LGUP
-Only see's my device when I enter download mode
-Says my device is unknown so won't do anything with it
-Restarted Computer
-Wants a .tot not .kdz, contrary to the guide posted - out my depth, whats the difference between a kdz and a tot?
-Click on upgrade
-Chose Europe OPEN H81510D.kdz
-Close and reopen LGUP
-Making sure Refurbish is chosen (kdz should still be active file)
-Click Start
-80% Reboots, Reboots, reboots, reboots...
-100% "Click here to continue" on computer
-Reboot
-Bootloop
Click to expand...
Click to collapse
4) Longshot
-now I assume that I'm back on lp, moving back to step 2 Flashtool 2014
-Connection to server failed
-ignored
-seconds later it starts flashing
-Bootloop
Click to expand...
Click to collapse
5) LGUP
-Same as 3 above, but with MM H81520a_00.kdz
-Complete
-Bootloop
-repeated to go back to Europe OPEN H81510D.kdz
Click to expand...
Click to collapse
12/12/2015
-I assume that in the uk the MM update was rolled out for the carrier free G4 and my phone chewed it up and then choked on it
-If someone figures it out let me know, otherwise its time for a new phone :/
-apparently you can use adb while LGUP is connected, might try it at some point, had enough for a couple hours
Click to expand...
Click to collapse
Updates
15/12/2015
GiffGff quickly give me a reference to send the phone back to them
@nashant recommended LG customer services (for those of us in the UK). Straight to LG, better option than via Giffgaff I feel.
0344 847 5454
http://www.lg.com/uk/support
Customer support were brilliant DPD out tomorrow to collect my phone. I will update as necessary. Take down your imei before sending it off
Click to expand...
Click to collapse
17/12/2015
DPD have collected my mobile. Fingers crossed!
Click to expand...
Click to collapse
22/12/2015
At the repair centre since 18/12/15 awaiting repair
Click to expand...
Click to collapse
04/01/2016
LG phones helpline is really busy - offering callbacks. I got one, they lost my phone :/
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05/01/2016
Turns out LG are that busy with returned phones at the moment, warranty repairs are being sent to none warranty repair centres - mine is at SV (?) - This is why they couldn't find my phone. Make sure that you take down your imei number before you send it off, seems this is how they track phones internally, not by your reference number. I am assured that SV (?) are going to do a fantastic job and I should get my phone back next Monday.
Click to expand...
Click to collapse
11/01/2016
LG haven't had an update from the repair centre... they are chasing it and will get back to me by Weds/Thursday.
Interesting part of the conversation, the person on the phone had said to me
Agent "Do you know its gone to the out of warranty repair centre.."
Me "Yes, I was told that it was so busy that they had to but I would get same quality repair"
I am hoping this isn't because of an unlocked bootloader, especially with the issue being duff hardware. Although this hasn't even been mentioned so far.... Starting to worry now. My house is full of LG electronics but I might not be using them again... !
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Click to collapse
14/01/2016
LG have refused the repair
I now have a fairly expensive paperweight and will never buy anything from LG electronics again, that annoyed I might even get rid of the tv and home cinema, seems a good time to upgrade to 4k anyway
Been bouncing back to Giffgaff all day re the consumer rights act in England and the EU directive. They seem to think as a retailer that they have no responsibility.
Which is a UK Consumer champion with extended rights, it discusses the Consumer Rights Act at that link.
"If you discover the fault within the first six months from delivery, it is presumed to have been there from the time of delivery - unless the retailer can prove otherwise."
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I am Hopeful that everything else will be smooth. +rep to @nashant for the recommendation re LG customer services.
dentralp
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Very nice post and that sounds logical. I think that the update would be the issue? I did have updates turned off though. I would like to add that I did also manage to get in hard reset mode or whatever that is called, but it just gave a black screen for a minute, then the LG logo, then the android installation icon thing, then went back to a bootloop.
Edit: I live in Holland, so the update would be rolled out in all of Europe probably?

Model: LG VS986LD
Carrier: Verizon
First three of serial: 506
I have flashed the correct KDZ multiple times and it has processed correctly in both LGUP & Flashtool 2014, but after still bootloops. I have done a factory reset from recovery and issue still occurs. Original Bootloop occur out of no where, no recent (5ish days) changes were made.

Hey, This is a BIG problem.
In my country (Thailand), sales model is H818P Dual-sim.
but Something wrong.
almost H818P with s/n 505xxxxxxxxxxx GOT THIS BOOTLOOP in DAILY!! since October after V10f firmware update.
(other s/n get this too. but very fewer than 505xxxxxxxx and most of all bootloop was used G4 for 3-6 month)
It's not software problem, it's a HARDWARE problem. Can't flash KDZ. still BOOTLOOP
Until today, It's about 2-300 user in Thailand ever get bootloop and almost of them is normal user not advance user. They only update via OTA no flash tool, no root, and no any modify. use as normal daily life. camera, social, call, game, even in sleep time. This booloop can be found anytime.
However, LGE Thailand had release 2 announcements about this in this month. but nothing. They only told user can get free mainboard replacement. FOR WHAT??? We have waruntee for 18 months.
IF LG DOESN'T DO SOMETHING BETTER THAN WAIT FOR BOOTLOOP AND GIVE A REPLACEMENT. MAY BE NEXT PHONE OF LG FANBOY IN THAILANG WILL NOT A "LG" BRAND EVEN LG SERVICE IS A BEST SERVICE IN THAILAND.
Sorry for my ENG.

This is a common occurance with G4. In Korea, MM update was pulled by LG for a while b/c it was causing HARDWARE failure! ONLY FIX was to switch out the board. The Korean forums were full of people complaining of this issue. Most common was surfing the net would cause the phone to reboot, then boot loop. In Korea, you can go to a service center, show them your phone, and the board will be replaced in less than an hour. Other common problems are screen ghosting, screen burn in, touch screen lagging...ect. People seems to have accepted the fact that if a G4 malfunctions, the most likey fix will be switching out the board. Luckly my G4 has been working fine since the day one, but I haven't updated to MM. I never update to a new OS when it first comes out. I've had my bad experiences with bugs and incompatible apps and what not whenever a new OS comes out. I think of them as somewhere between alpha and beta. never mind the code change that blocks some mods.
Sorry, I digress. Other people have reported similar symptoms, even if they didn't update to MM. They also say, the launch day released version of the phone ususally has this problem.

[removed by dentralp]

Disable Big Cores on Nexus 5X to get out of bootloop?

Yesterday my Nexus 5X got into bootloop (Yes, the problem that mostly ones are getting), I can get into Bootloader, but not system/TWRP, but I can get it booted in TWRP when placed in freezer.
Since Nexus 5x and LG G4 share the same hardware, and G4 is having the same bootloop problem, which can be fixed by disabling the Dual Core CPU (AKA Big Cores) and running only on the Quad Core CPU, probably Nexus 5X would work too.
The problem is that for disabling them is that it requires a .TOT file + LG software flash tool, which I'm aware of trying to use, and maybe wouldn't even work, the other method seem to do this:
/sys/devices/system/cpu/cpu4/online (open file and change from a one to a zero)
/sys/devices/system/cpu/cpu5/online (open file and change from a one to a zero)
So I would boot the phone in TWRP and let in there in the freezer, and with the USB attached to my laptop, and then adb pull the files, edit, and adb push again, what do you guys think? anyone with bootloop would like to try?

If you still have warranty, LG are offering full refunds since the 5X production stopped and no replacement parts are being made anymore.

Pwnycorn said:
If you still have warranty, LG are offering full refunds since the 5X production stopped and no replacement parts are being made anymore.
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Click to collapse
I bought my Nexus 5X on BestBuy when I was on the US, but I live in Brazil, where they don't even sell the phone.. I tried contacting LG US through their website support, but didn't get any email from them.

Try this: http://forum.xda-developers.com/nexus-5x/help/bootloped-hw-please-try-t3505392

moonlightdrive said:
Try this: http://forum.xda-developers.com/nexus-5x/help/bootloped-hw-please-try-t3505392
Click to expand...
Click to collapse
Thanks, I'll try it later.

Pwnycorn said:
If you still have warranty, LG are offering full refunds since the 5X production stopped and no replacement parts are being made anymore.
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Click to collapse
That isn't exactly how it was working.
Some people sent in their 5x to some service center who then replied offering to refund purchase price because parts weren't available.
Other people sent to other service centers who did have parts and weren't offered that option.
There was no general policy from LG to offer full refunds for all 5x submitted for warranty repair.
---------- Post added at 05:21 PM ---------- Previous post was at 05:18 PM ----------
rcoliveirajr said:
Yesterday my Nexus 5X got into bootloop (Yes, the problem that mostly ones are getting), I can get into Bootloader, but not system/TWRP, but I can get it booted in TWRP when placed in freezer.
Since Nexus 5x and LG G4 share the same hardware, and G4 is having the same bootloop problem, which can be fixed by disabling the Dual Core CPU (AKA Big Cores) and running only on the Quad Core CPU, probably Nexus 5X would work too.
The problem is that for disabling them is that it requires a .TOT file + LG software flash tool, which I'm aware of trying to use, and maybe wouldn't even work, the other method seem to do this:
/sys/devices/system/cpu/cpu4/online (open file and change from a one to a zero)
/sys/devices/system/cpu/cpu5/online (open file and change from a one to a zero)
So I would boot the phone in TWRP and let in there in the freezer, and with the USB attached to my laptop, and then adb pull the files, edit, and adb push again, what do you guys think? anyone with bootloop would like to try?
Click to expand...
Click to collapse
I suggest you do like the above poster mentioned and try the pre-built kernel that disables the big cores:
http://forum.xda-developers.com/nexus-5x/help/bootloped-hw-please-try-t3505392

sfhub said:
That isn't exactly how it was working.
Some people sent in their 5x to some service center who then replied offering to refund purchase price because parts weren't available.
Other people sent to other service centers who did have parts and weren't offered that option.
There was no general policy from LG to offer full refunds for all 5x submitted for warranty repair.
Click to expand...
Click to collapse
That may be true, but production of the device has been stopped. So that means that repair centers will run out of replacement parts soon, especially with the various devices going into this bootloop lately.

Pwnycorn said:
That may be true, but production of the device has been stopped. So that means that repair centers will run out of replacement parts soon, especially with the various devices going into this bootloop lately.
Click to expand...
Click to collapse
The details are actually important. For example if the 32GB MB is still in stock and you send in the phone, they might make you wait 2 weeks then send the phone back repaired (or not repaired making you do a 2nd round)
If on the other hand you know your service center is out of 16GB MB then you can safely send it in and have a good chance of getting a refund offer.
Also whenever you send the phone in, you have the chance LG will pull the fake water damage trick on you. A couple of people had this happen to them. This is the latest:
https://www.reddit.com/r/nexus5x/comments/5fuy99/sent_to_lg_for_bootlooping_claims_phone_is_water/
In that case, you might never get the offer for a full refund.
This is kind of a hit or miss game unless you have prior information for your service center.
There were people who sent in a 32GB model and it was repaired rather than getting the offer for the refund.
Also it is unclear about the H791 part for international.
Sure *eventually* they will all run out of parts, but the details matter about when and where because some people are getting close to the end of their warranty.
Now if LG had actually officially admitted the problem and said we will refund your phone if it gets hit with hardware bootloop, then I'd feel confident telling people they can get their money back.

Oops. Wrong thread.
But i have the same.

Need help!! LG G4(H815) not starting

Hi all,
so here is my problem.
Day before yesterday i had a perfectly working LG g4 H815 model with s/n 511 running on firmware v20h, when i decided to root it and install some mods.
so i flashed TWRP, installed xposed and xtrememusic mod. the phone booted normally after installing these. i didn't install any modules under xposed. the phone worked perfectly for two days. however today morning it hanged while taking photo with the camera app. when restarting it got stuck at LG logo for long time. My brother(who doesn't have any technical knowledge) pulled out the battery and restarted. Again it got stuck at LG logo. thinking somthing wrong he again repeated this only to find that it didn't power on at all this time. No LG logo no notofication light nothing.
Tried charging it(although battery was aroung 60-70%), pressing power button removing the battery. still nothing. the phone is not at all powering up.
However when i connect it with USB cable with laptop, laptop makes sound of getting usb connection detected. i took it to a service centre.
the technical guy there told that IC may have been faulty. he told me that motherboard needs to be replaced. however unofficially he may try heating the IC to get it booting.
What should i do now? Is the IC really fried. had the rooting and installing mod caused it?
Please help.
PS- the phone is imported and cannot be sent back for warranty purpose.

I think you are experiencing the dreaded LG G4 bootloop. I don't think rooting or modding caused a software problem. It "may" have caused a hardware problem simply because it generated enough heat to loosen the IC that little bit that initiates the problems you are describing. I rooted and installed the stock image in Nov 2015. Two weeks ago the phone froze - restarted and then could not be booted. LG sent me a Fedex label and I sent it off. Ten days later I received the same phone back. I assume they replaced the mainboard.
You should contact LG directly. I saw a class action suit that was called off because it appeared that LG will fix this particular problem (failed mainboard) out of warranty. Anyone please correct me on this if I'm wrong.

dsteinschneider said:
I think you are experiencing the dreaded LG G4 bootloop. I don't think rooting or modding caused a software problem. It "may" have caused a hardware problem simply because it generated enough heat to loosen the IC that little bit that initiates the problems you are describing. I rooted and installed the stock image in Nov 2015. Two weeks ago the phone froze - restarted and then could not be booted. LG sent me a Fedex label and I sent it off. Ten days later I received the same phone back. I assume they replaced the mainboard.
You should contact LG directly. I saw a class action suit that was called off because it appeared that LG will fix this particular problem (failed mainboard) out of warranty. Anyone please correct me on this if I'm wrong.
Click to expand...
Click to collapse
Hi thanks for the help.
But isn't the dreaded bootloop is that where the phone is stuck at the LG logo. Mine isn't booting at all. And the bootloop problem is due to big cores or such and not due to ic?

Mine wouldn't start at all - it bootlooped once for about a split second - then it was dead

Same is the problem with me. Bootlooped twice and then its completely dead. I have tried contacting Lg UK. Lets see what they say.

Ok so i got a reply from LG and they suggested me some steps to take (which are obviously not useful as it is completely dead). however they have also told me that they are willing to help me and asked me about details of purchase etc and "whether it was rooted".
so what should i reply rooted or not? will they detect it as it is dead.

dbzgoku said:
Ok so i got a reply from LG and they suggested me some steps to take (which are obviously not useful as it is completely dead). however they have also told me that they are willing to help me and asked me about details of purchase etc and "whether it was rooted".
so what should i reply rooted or not? will they detect it as it is dead.
Click to expand...
Click to collapse
Sorry to be late on reply. I advise to not answer question whether phone was rooted. Here is my reasoning:
1. This problem is widely occuring - only a tiny percentage of people root their phones therefore question is irrelevant.
2. The problem is known to be that an IC becomes loose most likely due to heat - a better question would be - do you place the phone on a hot dashboard with GPS running while you are charging?

dsteinschneider said:
Sorry to be late on reply. I advise to not answer question whether phone was rooted. Here is my reasoning:
1. This problem is widely occuring - only a tiny percentage of people root their phones therefore question is irrelevant.
2. The problem is known to be that an IC becomes loose most likely due to heat - a better question would be - do you place the phone on a hot dashboard with GPS running while you are charging?
Click to expand...
Click to collapse
thanks for the reply (although late). i have already sent the phone to LG replying as no root. Lets hope they repair it without any problems.
second i didnt do anything of anysort like placing on hot dashboard or such. one day while opening the camera app it decided to just hang and later on die on me.

I hope you didn't think I was saying you might have done something that would overheat your phone such as my second example. I was trying to come up with an example reason the IC loosens. Even if you did that the phone should survive such conditions. Let's hope the replacement motherboards somehow do better. My guess is that the soldering job is fine, the problem is probably bad design that doesn't "vent" the heat from chip.

dsteinschneider said:
I hope you didn't think I was saying you might have done something that would overheat your phone such as my second example. I was trying to come up with an example reason the IC loosens. Even if you did that the phone should survive such conditions. Let's hope the replacement motherboards somehow do better. My guess is that the soldering job is fine, the problem is probably bad design that doesn't "vent" the heat from chip.
Click to expand...
Click to collapse
so what do you suggest after repair should i keep it or sell it? Lg g4 is no doubt the best phone when considering the value for money. no phone even twice in price comes close in camera and screen quality especially. but the unreliability of this phone has made me to consider selling it as soon as i get it back.

I'd keep it if your new board is high serial

lukem99626 said:
I'd keep it if your new board is high serial
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Click to collapse
Well my old board was also high serial, beginning with 511

I'm going to take my chances - it's a great phone until it bootloops. I'm going to avoid scenarios best I can that could result in the phone heating up inside. That would be charging only if absolutely necessary while in my ProClip dash mount if the car is hot, using backup battery after depletion instead of charging more often etc. Thinking back I rarely put the phone into heat inducing situations - normal use results in the IC becoming loose at the 1 year mark. If mine bootloops exactly a year from now and LG fixes it again I'm an LG fan. If they blow me off no more LG.
I really regret not paying it off early and taking the $15/month deal for an S7 Edge last month

dbzgoku said:
Well my old board was also high serial, beginning with 511
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Click to collapse
I mean like 611 ect thats what i got from lg

dsteinschneider said:
I'm going to take my chances - it's a great phone until it bootloops. I'm going to avoid scenarios best I can that could result in the phone heating up inside. That would be charging only if absolutely necessary while in my ProClip dash mount if the car is hot, using backup battery after depletion instead of charging more often etc. Thinking back I rarely put the phone into heat inducing situations - normal use results in the IC becoming loose at the 1 year mark. If mine bootloops exactly a year from now and LG fixes it again I'm an LG fan. If they blow me off no more LG.
I really regret not paying it off early and taking the $15/month deal for an S7 Edge last month
Click to expand...
Click to collapse
Well lg did mention in my communication with them that this carries 2 year warranty.

lukem99626 said:
I mean like 611 ect thats what i got from lg
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Click to collapse
Didn't know that serials have gone so high

dbzgoku said:
Didn't know that serials have gone so high
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Click to collapse
I brought a g4 in the new year sale it has the serial of 611 i had a 601 few months back i returned it ran hot and laggy the 611 one is cool running and lag free so i think something changed

Boot Loop on S/N 605

After about a year of replacing my LG G4, the boot loop happened again.
I turn on my phone, got to the launcher, phone starts to heat up and crashes, and the process repeats till it doesn't even get past the boot screen.
I'm using the H818N Model, can this be fixed with LG Bridge, up or flashing?

LoneZX said:
After about a year of replacing my LG G4, the boot loop happened again.
I turn on my phone, got to the launcher, phone starts to heat up and crashes, and the process repeats till it doesn't even get past the boot screen.
I'm using the H818N Model, can this be fixed with LG Bridge, up or flashing?
Click to expand...
Click to collapse
Send er back to lg

TheMadScientist420 said:
Send er back to lg
Click to expand...
Click to collapse
The last time I sent it back, they almost made me pay for warranty. I don't wanna repair a phone that ends up spoiling in a year later.

I'm sorry to hear that. I always assumed that replacing the main board will not fully fix the issue and this is the proof
The best Chance to not have the bootloop issue again is buying a phone which was never refurbished so where the whole phone was manufactured in 2016 beginning from February. But even then there is no guarantee ...
To be sure if you have the hardware issue again you could try to flash a full factory image but backup your data first!!
.
Sent from my LG-H815 using XDA Labs

steadfasterX said:
I'm sorry to hear that. I always assumed that replacing the main board will not fully fix the issue and this is the proof
The best Chance to not have the bootloop issue again is buying a phone which was never refurbished so where the whole phone was manufactured in 2016 beginning from February. But even then there is no guarantee ...
To be sure if you have the hardware issue again you could try to flash a full factory image but backup your data first!!
.
Sent from my LG-H815 using XDA Labs
Click to expand...
Click to collapse
Backup my data first? How? I can only get to the home screen for at least a minute before it starts looping.

LoneZX said:
Backup my data first? How? I can only get to the home screen for at least a minute before it starts looping.
Click to expand...
Click to collapse
If you do not want to fight with LG support about warranty I would try this first:
hair dryer method A)
If you dont care about LG support (means they MAY reject the service due to detection of an unauthorized opened device)
pressure method -> hair dryer method A) -> hair dryer method B) -> freezer method -> baking method (I would prefer baking before freezer as long as u have an oven which is not used for food anymore)
pressure method:
(as u need to open the device it may be rejected by LG support for repair)
https://forum.xda-developers.com/g4/help/lg-g4-bootloop-quick-fix-try-baking-t3633595
hair dryer method:
A) https://forum.xda-developers.com/g4/help/temporary-boot-loop-solution-to-files-t3554469
B) https://forum.xda-developers.com/showpost.php?p=71647715&postcount=41 (checkout the video and the last comments of the writer in the XDA thread)
(as u need to open the device it may be rejected by LG support for repair)
baking method:
https://forum.xda-developers.com/g4/help/solution-lg-g4-bootloop-issue-story-t3322382 (ensure you read the toxic fume hint!)
(as u need to open the device it may be rejected by LG support for repair)
freezer method:
https://forum.xda-developers.com/tmobile-g4/help/how-to-recover-data-boot-loop-defect-t3297766 (~1 hour in freezer)
(The freezer does not require to open the device BUT: it could be possible that LG may reject such devices for repair due to a water damage (depends on several things so this might or might not happen))
Once booted up backup your data as fast as you can. Btw if any of the above succeeds its very very likely that you have a defective hardware again so no need to flash a KDZ then but well it would hurt to try it regardless.
.

My LG G4 SN601 bootlooped after 1 year and 2 months. Because of unlocked bootloader and LineageOS installed, LG didn't repaired or refunded my phone. Only after an argue with local seller I got my money back. LG never again! ... I won't buy anything from them again, not even hairdrainer! LG was a big mistake, they don't make so good quality products like many years in past. I bought iPhone 7 128GB instead. I hope that people in US CA will crush LG and all affected customers will get their money back even if out of warranty.