[Q] Ok to replace mainboard with new one? - G3 Q&A, Help & Troubleshooting

So, my G3 is completely dead, failing to boot. I know the screen and battery are absolutely fine as I get battery warnings displayed when no battery is inserted or when it's actually dead. I've decided the cheapest option would be for me to replace the main board and have found an exact replacement for my model (16GB, 2GB RAM, D855).
Seen a teardown on YouTube and having taken other devices apart before (once worked for LG themselves) it looks easy enough for me to do. My only question is, will I experience any problems replacing the MoBo or should it be a simple process in regards to getting it to boot?
Sorry if I haven't bee specific enough, I'll try to explain as best as I can if anyone wants to know more.

Related

Anyone got EXPERIENCE on screen replacement please?

PROBLEM:I have an SX66 which has a broken screen. I dont want to spend a whole lot of money on it. (This is an experiment to see what improvement over my Wizard the BA is)
I also happen to have a Verizon XV6600 which no one seems to want? It seems to be a 0x4. The Siemens may be an Ox6??
I know before taking them apart that there is a Topopoly and a Sony screen and cant figure out when HTC used either or for what reason or if they just depend on which screens they had in stock when they made the units. Before I start taking the Mint CDMA Verizon apart: Does anyone know if the two screens (and presumably digitisers as well) are interchangeable please?
Sorry to ask hardware question on XDA (Where DO you ask these questions?)
They DO interchange although the instructions are only fairly useful: There is a relatively obvious screw which isn't mentioned AND it might have been worthwhile saying whether you CAN or CAN'T simply interchange the whole frontal assembly instead of taking the whole thing apart down to every screw and PCB just to get a new screen in.

[Q] Question About Swapping Motherboards

I am one of the "lucky" few who have a phone that reboots when using GPS Navigation and now pretty much while doing anything intensive on the phone. When it reboots I get the 5 vibrations and flashing green LED. A battery pull and sometimes a long wait period are required to get it back up and running until it chooses to reboot again (same cycle). Flashing back to stock and un-rooting does not help, nor does flashing a different radio (I've tried them all). Anyway, this problem is all over the net and it seems the only cure is replacing the phone. I don't have that option because I have no warranty.
Enough of the background....
I am planning to purchase a 'for parts' Inc off Ebay. There are several where the screen is just broken but everything else supposedly works (clean ESNs). I intend to buy one of those and basically transplant the motherboard into mine. I've had mine apart already, so I know I can perform the task.
My questions...
1) What if the 'parts' phone I purchase has a SLCD screen? I plan to use my AMOLED screen. Would it work to use my AMOLED screen with a motherboard from a a phone that currently has an SLCD?
2) Any other reasons my proposed methodology won't work? I don't plan to replace anything that required soldering, so this should be pretty straight forward.
Epicardium said:
I am one of the "lucky" few who have a phone that reboots when using GPS Navigation and now pretty much while doing anything intensive on the phone. When it reboots I get the 5 vibrations and flashing green LED. A battery pull and sometimes a long wait period are required to get it back up and running until it chooses to reboot again (same cycle). Flashing back to stock and un-rooting does not help, nor does flashing a different radio (I've tried them all). Anyway, this problem is all over the net and it seems the only cure is replacing the phone. I don't have that option because I have no warranty.
Enough of the background....
I am planning to purchase a 'for parts' Inc off Ebay. There are several where the screen is just broken but everything else supposedly works (clean ESNs). I intend to buy one of those and basically transplant the motherboard into mine. I've had mine apart already, so I know I can perform the task.
My questions...
1) What if the 'parts' phone I purchase has a SLCD screen? I plan to use my AMOLED screen. Would it work to use my AMOLED screen with a motherboard from a a phone that currently has an SLCD?
2) Any other reasons my proposed methodology won't work? I don't plan to replace anything that required soldering, so this should be pretty straight forward.
Click to expand...
Click to collapse
The AMOLED device won't work in the SLCD device because the drive electronics integrated into the board for the AMOLED are different.
loonatik78 said:
The AMOLED device won't work in the SLCD device because the drive electronics integrated into the board for the AMOLED are different.
Click to expand...
Click to collapse
Thank you. That's just the information I was looking for. <mashing the ty button>
My Dinc had the same problem as yours. Basically the ball array that connects the processor to the board is failing.
Take a look at this thread..
Solving the thermal problems of HD2 or other snapdragon
I heated my processor and managed to save my phone. It is definitely a last ditch effort, but if you are going to buy another motherboard it might be worth a shot.
HillsRider said:
My Dinc had the same problem as yours. Basically the ball array that connects the processor to the board is failing.
Take a look at this thread..
Solving the thermal problems of HD2 or other snapdragon
I heated my processor and managed to save my phone. It is definitely a last ditch effort, but if you are going to buy another motherboard it might be worth a shot.
Click to expand...
Click to collapse
Wow... That's pretty hard-core phone repair! Just...... Wow.
I had done just the basic pc builds & repairs until I attempted this. It was a little intimidating, but I love my phone again!

[Q] Use 16GB Board to Repair 32GB Version?

I have a 32GB version of the 2013 Nexus 7 tablet that has failed at the Google screen. I have read enough forums to know the only way to fix this is to replace the main board. Does anyone know if I can replace the board from the 32GB version with a 16GB version? These seem much more available.
Thanks!
http://forum.xda-developers.com/showthread.php?p=60397387
Yes. I just completed the repair successfully today.
Good to know. The 16GB board is $35 and the 32GB is $85. Just ordered a replacement for mine on Amazon. I got around to updating to 5.1 just late last week and this morning woke up to the Google screen.
As i sit staring at my equally dead 32GB, the only thing keeping me from ordering a replacement, is... . will it happen again? lets face it, most replacement boards are pulled from broken/used tablets, and if this is something that happens after a time, it will just happen again. Personally, i am not too keep on buying replacement after replacement for an aging tablet. Now, if somebody comes up with a good WHY it happened, and what can prevent it, ill be interested again..
Divine_Madcat said:
As i sit staring at my equally dead 32GB, the only thing keeping me from ordering a replacement, is... . will it happen again? lets face it, most replacement boards are pulled from broken/used tablets, and if this is something that happens after a time, it will just happen again. Personally, i am not too keep on buying replacement after replacement for an aging tablet. Now, if somebody comes up with a good WHY it happened, and what can prevent it, ill be interested again..
Click to expand...
Click to collapse
Seems to be a random glitch. Some attributed it to the brand or batch of eMMCs used on the motherboard, though it's more an educated guess than solid proof . From my perspective, using a custom rom somehow eludes the problem completely. And I've tried at least 4 or 5. Apparently, the OTA modifies the partitions in such a way that makes it potentially susceptible to such failure. So if you insist on official roms only, you're assuming that risk.

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
Click to expand...
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
Click to expand...
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
Click to expand...
Click to collapse
Didn't know that serials have gone so high
dbzgoku said:
Didn't know that serials have gone so high
Click to expand...
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

How to Determine The Wear and Use of a Used LG G3

I need to buy a used LG G3 D851 off eBay. I'm trying to determine if there is a way to find out the wear & usage on the G3. Looking at the physical condition of the phone isn't useful (cases & screen protectors protect against wear & tear). After buying (and returning) two broken G3s I've learned that "refurbished" means "we cleaned it with a towel", and that "new" means "a used phone in the original box".
As I understand it the only thing on any mobile phone that really wears is the camera which degrades over time. I thought that there was a hidden menu option that had an entry on how many photos were taken, which would help, but I can't find it.
I was hoping there would be a hidden menu timer or counter somewhere that can tell me how often the phone has been used?
Any hints or suggestions would be greatly appreciated! :good:
I have had close to a dozen LG G3s over the last 4 years. I have been trying to find a decent D855, but run into D850s , 851s, LS990s and VS985 for parts.
The biggest problem with these is the poor manufacturing of the components on the motherboard. The phones are dirt simple to take apart and swap parts on, and, by now, you should assume that the phone you are about to buy is not what you think it is.
Like George Washington's axe. Someone swapped the handle, then someone swapped the blade...
If you trust the seller to be honest, get a used one that has had little use and ask the seller if it bootloops, has wifi issues, bluescreen, fadeout...these are all motherboard problems.
Thanks @rs899 that's the problem I've had. In one case I bought what was supposed to be a D851 but it was a screen-locked LS999. Another one had WiFi that didn't work. In every case the phones were advertised as refurbished and "passed our extensive in-house diagnostics".
In every situation I had to file a complaint with eBay to get a refund as the seller was not cooperative.
At this point in the phone's life, it is unreasonable to spend much on these. I myself put a couple of phones together out of parts , used them a few days, and sold them as "used" on ebay fairly cheaply. If anyone complains in 30 days I will have them ship it back and refund them (or just simply refund them). The motherboards are a time bomb. The MBs in the ones I sold may not have been used much and may last for some period of time...or not.
I have a D-851 that I thought was pretty reliable. It has started to forget my wifi. The end may be near for that one.
@rs899 thanks for the info. BTW I have long fingers, and the back buttons on the LG G3 are perfect for me (I looked at the G4 but it is famously unreliable even when new & too big for my needs).
My daily driver is a rooted LG G3 running stock KitKat. I'd like to upgrade to a Marshmallow ROM but I'm nervous about losing functionality on the phone if the upgrade goes bad. So my plan is buy another LG G3 D851 and do the upgrade on that, then transfer my nandroid backup & microSD card to the new one. Maybe I'll give it one more shot on eBay & see if it works out. If you have a d851 for sale DM me your eBay ID & I'll check it out!
I don't have anything for sale right now. I have a D-850 I am playing with and figured out how to put Lineage 17.1 on, but now it drops wifi. I have that D851, but I don't trust it either. A very bad D855. Nothing I would either use or sell to my worst enemy...
LG G3 Ear Speaker
rs899 said:
I don't have anything for sale right now. I have a D-850 I am playing with and figured out how to put Lineage 17.1 on, but now it drops wifi. I have that D851, but I don't trust it either. A very bad D855. Nothing I would either use or sell to my worst enemy...
Click to expand...
Click to collapse
You wrote that you replace parts on these G3 phones. Do you know if the ear speaker on the front of the phone loses clarity over time? I'm wondering if I should go through the trouble to replace mine. Thanks

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