Develop Bugs

[Q] Bricked - No LG Logo, No DL Mode, USB "Sounds"

Hello, first I'd like to thank you for your time reading this.
Note: I've searched the forums a lot, even for other LG Devices (G2 for ex) but I couldn't find a solution.
Trying to flash CM12 by _infected (amazing rom, working as a daily driver on my other lg pad btw) and messed up something on TWRP.
-First trying to do a Factory Reset via TWRP gave me "failed to mount /data" and "/system" I rebooted and the device went straight to TWRP Recovery, I rebooted again, this time making sure I selected "Reboot to System" and it went again to TWRP Recovery...
- I did another wipe, this time wiped everything (all checkboxes in TWRP), reboot and... no boot...
Now my LG Pad is at the following State:
- Black Screen (No LG Logo)
- Connecting USB to Windows gives the "connected sound"
- Adb doesnt find device (driver was installed and working).
- Device Manager "refreshes" on USB plug but doesnt show the device (or I can't find it?).
- Holding Power on the tablet while USB plugged to Windows gives the "disconnected sound" -> "connected sound" -> "connected sound".
- Can't boot into Download Mode.
- Can't turn off the Tablet... only Reboots holding Power key.
Please? Any help?
What can I do?
Is warranty void at this point?
Thank you very much for any help you can provide.

I have a G pad in the same situation, and I wasn't able to fix it. I managed to pick up another cheap one, but I'll follow this thread in case you get an answer.

You have to find a way to get it into download mode or you wont be able to fix it with LG Tool

What did you mess up, and how did you install twrp ? Also what twrp version abd base.

mekoneko said:
What did you mess up, and how did you install twrp ? Also what twrp version abd base.
Click to expand...
Click to collapse
For me personally, I assumed it'd be as easy as the twrp page makes it out to be , or my nexus 4 was, so I just went for it. I ran into that secure boot error with twrp, and rebooted back into stock. There was an OTA update, so I did it (stupid I now realise) and that bricked it on reboot. It won't turn on at all. If i plug into USB on a computer it OCCASIONALLY brings something up on the screen, the LG logo I think or something, but I cannot for the life of me get it into download mode. It's at home right now, so ic anot remmeber the exact thing it shows on screen, but almost certainly not download mode, and none of the hardware buttons seem to be responsive for doing factory resets or download or anything.

I managed to send the LG G Pad to warranty and got a new one... Lucky me...
Guess that if we can't get into DL mode they can't either.
However after much investigation I've realized that the problem was a corrupted system partition...

[Q] Need help to fix my bricked LG G3

hello geeks,
I really need serious help. First the setup I have is as follows
1. I have LG G3 D855 but its european or Hong Kong or Taiwan version I don't know. I bought it in India. I updated it to android 5.0 Lollipop. Everything is fine till now.
2. Then I rooted my phone. This step was also fine. No problem.
3. Then I tried to download camera mod v2.0 to get some extra camera features like 60fps. In this step I got problems. I downloaded the media_profile.xml and copied it to /system/etc. But I made a mistake that I did not change its permission and rebooted the phone.
I am troubleshooting from a windows 8.1 PC. I downloaded the LG USB driver.
Due to this my phone stop at initial LG,Life is Good Screen. I tried different methods in internet.
1. I tired to access the device file file through adb. But the adb does not list the device.
2. I tried to use fastboot mode, but still fastboot does not list device when in the boot screen.
3. I pressed down pwr + volume down button and release after screen come up and then press again. I was asked to erase user data. I said yes and it erased the data. But still the same symptom when I reboot. Stuck at initial screen.
4. I tried to use LG PC Suite. But it does not even detect phone through the USB and there is no repair button.
5. I tried to enter downloading mode. This one is strange. I pressed down the vol up and then connected USB. But sometimes only it enters downloading mode and sometimes not. May be once in 10 times it enters downloading mode and 9 times it goes to initial boot LG screen.
I am not sure whats going on. Can anybody help me to figure it out ? Please help.

Thats because your not doing it properly
Research a guide on how to enter download mode and after that you can use flashtool to wipe your system and reinstall the original lg firmware

LG G4 H81510h download mode not working

Hello Gurus,
Well i am trying to boot my phone into download mode but i am continuously getting
secure booting error 1014 and my phone then boots lollipop 5.1 which is stock rom.
my lg g4 model is h81510h build number lmy47d, it is not rooting or flashed anyway.
I want to flash flash marshmallow kdz with lg flash tool but my phone is not booting into download mode, please help or suggest any other method

HALP PLS
I'm having more or less the same problem. I bought a used H815 and it came with Android 5.1 (software version h81510h)rooted and stock recovery. I tried upgrading to MM over OTA but tapping Update Center leads me directly to the App Update screen instead of giving me a choice between software update and app update.
That is when I decided to go the KDZ route but when i tried switching the phone to download mode it went there and in the top left corner there was this 'Secure Booting Error 1014' message and then it restarted in about 5 seconds. I have tried this multiple times with the same exact result.
ADB detects my phone but when I send the 'reboot bootloader' command it just does a plain reboot so I can't use any of the fastboot commands. I also have no idea whether this phone has an unlocked bootloader or not.
Also for some weird reason my phone is not using the MTP mode when I connect it to my PC. It either uses PTP or charge-only depending on what I select but if I select MTP it automatically reverts to the previously selected mode. LG Bridge doesn't detect it and neither does the Mobile Support Tool but I can transfer images just fine. MTP was working last night but it suddenly stopped working and I have no clue why.
I can get into the recovery without any problems.
Please help me get it working again

you-mair said:
I'm having more or less the same problem. I bought a used H815 and it came with Android 5.1 (software version h81510h)rooted and stock recovery. I tried upgrading to MM over OTA but tapping Update Center leads me directly to the App Update screen instead of giving me a choice between software update and app update.
That is when I decided to go the KDZ route but when i tried switching the phone to download mode it went there and in the top left corner there was this 'Secure Booting Error 1014' message and then it restarted in about 5 seconds. I have tried this multiple times with the same exact result.
ADB detects my phone but when I send the 'reboot bootloader' command it just does a plain reboot so I can't use any of the fastboot commands. I also have no idea whether this phone has an unlocked bootloader or not.
Also for some weird reason my phone is not using the MTP mode when I connect it to my PC. It either uses PTP or charge-only depending on what I select but if I select MTP it automatically reverts to the previously selected mode. LG Bridge doesn't detect it and neither does the Mobile Support Tool but I can transfer images just fine. MTP was working last night but it suddenly stopped working and I have no clue why.
I can get into the recovery without any problems.
Please help me get it working again
Click to expand...
Click to collapse
Any update ? I am also facing same issue. One wierd thing I noticed that adb devices displays phone as "LGLS991" can you tell me your result of adb devices ?

Im having the same problem.
Lg bridge, lgup and flashtool not detecting my phone. How to flash my phone with any os? Kindly help me

Same problem with my H811. Any solutions?

I cant get my g4 into download mode. I was able to earlier but it died on me. My buddy has the same phone so I am using his fully charged battery now (mine was around 40$) but I'm still getting nothing. Should I reformat the SD card and try again? I can't think of anything else.

Solution for Hard Bricked LG G4 (9008)

Hi guys,
Some people including me faced Hard brick issue with LG G4, which has now two solutions. the first is temporary, i discovered it and it involves using an SD card flashed with Original EMMC dump ( i tested it with H815 ands H811) , the second needs advanced hardware, equipment and soldering skills ( JTAG) .
The solution that i want to explore is trying to revive the phone with the SD card.
http://forum.xda-developers.com/g4/development/unbrick-lg-g4-h811-9008-qualcomm-t3456417
http://forum.xda-developers.com/g4/development/unbrick-lg-g4-h815-9008-qualcomm-t3452853
The H811 dump that i made has TWRP recovery and unlocked bootlloader, so if someone know how to help that would be awesome.
How ???, its very simple. I dont have very good UNIX architecture skills , but if the SoC successfully booted from the SD card. We could see if it detects the EMMC memory ( with parted or with LS command). I personally Tried to brow /dev/block directory from TWRP i hoped to find MMCBLK1 or something but that was unsuccessful , im pretty sure the TWRP or the Soc Does not mount it automatically .
I really dont know How , but i'm very Sure that there is a Solution headed that way , So if some one is Good with Unix architecture and can find a way to soft Flash the EMMC from TWRP ( installed in the SD card ) it would be very Nice

hi,i tried the sd card method...it boots but immediately gives me secure boot error (1006).
i have an h815 bl locked

Hello
I have LG H815 and have bricked. I have installed wrong firmware so it is brick now.
I try new tot file with QPST . but it says fail what s wrong with me?
My computer is win 10 64 bit

You can fix fastboot mode with this way.
1. First you need to download stock rom that your phone supported. extract laf.img file from rom and copy it into fastboot directory
2. download LG Flash Tool and make it ready
3. open flash tool and load firmware and dll that support your model.
open command prompt and make sure you in fastboot directory where the fastboot and related files are stored.
Run following commands.
fastboot erase recovery
fastboot erase laf
fastboot flash laf laf.img
fastboot reboot
Click to expand...
Click to collapse
Hurry up, now you need to start flash with lg flash tool, if device does not start into download mode. remove battery and insert again, press and hold Vol Up btn and plug USB cable it will boot into download mode. and your device com port should be 41, if not change it in device manager. and start LG Flash tool to load stock rom. once it finish loading rom your device will start and will show you factory test 1, 2, or 3. if it stuck there more than 3-5 minutes. reboot your phone. now you will have welcome screen.
I hope this will work with supported models.
Hit Thanks button if this work for you to help others for this useful reply.

ayuda
sylentears said:
You can fix fastboot mode with this way.
1. First you need to download stock rom that your phone supported. extract laf.img file from rom and copy it into fastboot directory
2. download LG Flash Tool and make it ready
3. open flash tool and load firmware and dll that support your model.
open command prompt and make sure you in fastboot directory where the fastboot and related files are stored.
Run following commands.
Hurry up, now you need to start flash with lg flash tool, if device does not start into download mode. remove battery and insert again, press and hold Vol Up btn and plug USB cable it will boot into download mode. and your device com port should be 41, if not change it in device manager. and start LG Flash tool to load stock rom. once it finish loading rom your device will start and will show you factory test 1, 2, or 3. if it stuck there more than 3-5 minutes. reboot your phone. now you will have welcome screen.
I hope this will work with supported models.
Hit Thanks button if this work for you to help others for this useful reply.
Click to expand...
Click to collapse
hi , am sorry for my inglish is bad
my lg h815 don't have recovery mode , no fastboot mode , no logo,
without connection to the computer when before if it was
only when press power button the phone make a 1 vibration, but nothing more
i need help¡¡ the phone woking with normality , i make downgrade to mm, bootloader unlocked unofficial, install twrp and flash firmware to android n, flash rom v30 h-rom, and magistic, after swipe for reboot birck no more display
one more thing, when press power button the phone make a vibration but no image in the display , wait a 30 seconds and again press power button and appears a imagen with 0% and a connection cable but I connect it and nothing, the screen turns off, another thing when I remove the battery with the phone connected to the PC the non-battery icon appears but when I put it back it turns off I want to think that it is not hardware
the phone worked very well until I gave it a restart, I hope it is not the plate regarts from arequipa, PERU sorry for my inglish

MichaelCV said:
hi , am sorry for my inglish is bad
my lg h815 don't have recovery mode , no fastboot mode , no logo,
without connection to the computer when before if it was
only when press power button the phone make a 1 vibration, but nothing more
i need help¡¡ the phone woking with normality , i make downgrade to mm, bootloader unlocked unofficial, install twrp and flash firmware to android n, flash rom v30 h-rom, and magistic, after swipe for reboot birck no more display
one more thing, when press power button the phone make a vibration but no image in the display , wait a 30 seconds and again press power button and appears a imagen with 0% and a connection cable but I connect it and nothing, the screen turns off, another thing when I remove the battery with the phone connected to the PC the non-battery icon appears but when I put it back it turns off I want to think that it is not hardware
the phone worked very well until I gave it a restart, I hope it is not the plate regarts from arequipa, PERU sorry for my inglish
Click to expand...
Click to collapse
lol, when you see a screen with 0% and a usb connected image, that mean your battery dead
why not just try to charge your phone? or replace a battery?

ling751am said:
lol, when you see a screen with 0% and a usb connected image, that mean your battery dead
why not just try to charge your phone? or replace a battery?
Click to expand...
Click to collapse
Hello, well after what happened I thought the same and went to buy another battery and when they tried it did not work, I repeat, not fastboot, no logo, no recovery, only a small vibration without screen, it is not detected by the PC in any of its modes as dead, the detail is that this happened after restarting when I had flashed bootloader N, rom V30, magiistic, I gave it restart and it did not turn on again, so I discard that it is hardware .
I think the problem was that I flashed the bootloader with full aboot, that gave me hardbrick I was told in a forum in Spanish I leave the link I hope you help me thanks
https://www.htcmania.com/showthread.php?t=1397519 use this method to unlock the bootloader

Hey MichaelCV
I have exactly the same problem with my LG G4 H815p. I was running [ROM][H815] H-ROM G4 NOUGAT [v29a] _ LG G4. The phone was up and running and last night I flashed the "LG-H815_29a_Modem_and_Bootloader.zip" to try resolve an issue I was having with the mobile data indicator not showing. I flashed the zip in TWRP, rebooted the phone and now it is bricked. I have exactly the same symptoms as you. Windows and FWUL does not see the phone, no matter what combination of keypressed etc that I try.
Lets hope we find a solution here for it.
Chris

Stuck on TWRP Recovery mode (LG G3 d855)

So after accidently wiping everything I had on both SD and Internal memory trying to make a custom rom work, I was stuck with a phone that only has TWRP on it, basically. Now after I've been through this guide TO THE LETTER: http://www.droidviews.com/install-stock-android-marshmallow-lg-g3-d855-using-twrp-recovery/ I can see it installed an OS but I cant seem to get my phone to load it! SO then I tried entering recovery mode and getting back to default, it didn't change anything, so I tried installing Zoe rom (https://forum.xda-developers.com/lg-g3/development/zoe-rom-v1-0-mm-6-0-stock-v30a-d855-t3402087) and It STILL ONLY LOADS TWRP even though the installation seemed to be successful!
So what do I need to do? Just flat out delete TWRP? or what? Pleas advise as I'm desperate. If needs be, redirect me to how to just completely reinstall everything from scratch to 6.0 or 7.0 (preferably). I was on 4.x.x for ages and I just wanted to update, instead destroyed my phone. Sigh.
UPDATE: Another thing I've tried is to flash it with KDZ file from the PC. I can see the phone, I can transfer files to it, but windows DOES NOT recognize in the device manage so when I tried to use the flash tool, after clicking "Start" it pops a new window which gets to 60% and then stops saying the phone is not connected to the pc.

Malkishua said:
So after accidently wiping everything I had on both SD and Internal memory trying to make a custom rom work, I was stuck with a phone that only has TWRP on it, basically. Now after I've been through this guide TO THE LETTER: http://www.droidviews.com/install-stock-android-marshmallow-lg-g3-d855-using-twrp-recovery/ I can see it installed an OS but I cant seem to get my phone to load it! SO then I tried entering recovery mode and getting back to default, it didn't change anything, so I tried installing Zoe rom (https://forum.xda-developers.com/lg-g3/development/zoe-rom-v1-0-mm-6-0-stock-v30a-d855-t3402087) and It STILL ONLY LOADS TWRP even though the installation seemed to be successful!
So what do I need to do? Just flat out delete TWRP? or what? Pleas advise as I'm desperate. If needs be, redirect me to how to just completely reinstall everything from scratch to 6.0 or 7.0 (preferably). I was on 4.x.x for ages and I just wanted to update, instead destroyed my phone. Sigh.
UPDATE: Another thing I've tried is to flash it with KDZ file from the PC. I can see the phone, I can transfer files to it, but windows DOES NOT recognize in the device manage so when I tried to use the flash tool, after clicking "Start" it pops a new window which gets to 60% and then stops saying the phone is not connected to the pc.
Click to expand...
Click to collapse
I just got over something like this this morning. First, you need to ensure you have the LG Universal drivers installed for your phone. Get them here.
Next, reboot your machine.
After this, I made sure the PC recognized all 3 modes of my phone, TWRP mode (boot to TWRP, connect), Download Mode (boot to download mode with cable) and, at least in my case, the flashing lights mode (shows up as QHUD Bulk or something).
After that, I ran the KDZ restore program successfully.
Good luck and let me know how it goes.