LG G3 D855. shutoff, wont boot up. Bricked - G3 Q&A, Help & Troubleshooting

I have this LG G3, and it switched off and wont boot up again. It registers as a qualcomm device in device manager when connected to computer but I cannot access recovery or download mode unfortunately. It wont charge. Only sometimes will it boot and show the lg logo for about 10 minutes before going into fastboot and tried to erase through fastboot but cannot. I want to fix it and have tried a number of methods but with no breakthrough. How can I unbrick it?

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[Q] LG G3 D855 Going to Fastboot, not staying on download mode, need stock back on

I am looking for the easiest way please to get my phone working again. LG G3 D855 from HongKong? LGD855XA9BK
I am not bothered about keeping anything on the phone, it can be formatted wiped, whatever.
When I Vol down and connect to pc usb, it takes about 7 seconds of a blank screen to the initial LG Lifes Good logo,, from there it sits another 15 seconds until the download mode logo pops up. This is up for approx 8 seconds (which my pc does not detect as a device) and then goes into fastboot which my pc does detect.
in a cmd window if I type fastboot devices command, the device ID appears as a single ' ? '
Gotten TWRP 2.8 for LG G3, If I type fastboot boot twrp.img then the twrp logo appears on the phone but goes no further - I have to battery pull. But..
keeping the twrp logo on the phone, if i type again fastboot devices from a cmd then there is no device listed.
still keeping the twrp logo on the phone if i type adb devices then the full device id appears as it should.
I'm going in circles and I'm not sure what cause the problem in the first place. I'll be happy with stock back on (tried the flash tool but pc won't detect the phone in fastboot, the lg recovery tool is the same) but I'm struggling where to start.
If this has been covered with success than I can't find it in the forums. If anybody can point me in the right direction then that would be great.
Thankyou in advance!
(p.s. I though I posted this question whilst not logged in to my account previously, so it is listed previously under a guest account which can now be deleted, but keeping this one. With thanks)

[Q] Broken from update to Lollipop (stuck in fastboot)

I've seen some other people with this problem, but there have been no fixes.
The problem is that the phone was updated to Lollipop. It worked for a little bit, but after a couple of minutes lots of programs started force quitting, and it eventually turned off.
When it turns on, it takes about 20 minutes, and then goes into fastboot mode.
If I try to get into download mode, it stays on download mode for around 15 seconds, and then it continues into fastboot mode. Windows does not recognize the phone in download mode, so I can't restore anything from there.
What I have learned then is that I need to flash the laf.img file, which I got from download the official firmware from LG's website by inserting my IMEI, so it's the right version, and then trying both fastboot flash laf laf.img, as well as fastboot
boot laf.img. The problem is that they both fail writing, but it's not just that command. I can't do fastboot erase recovery, or fastboot erase anything, only thing that works is fastboot reboot.
Does this mean that the internal storage is broken? Is there anything else I can do? I can execute fastboot commands, but it seems like I cannot write anything. The drivers seem to be working, as it's recognized as a fastboot devices, but it only says
? fastboot devices
All commands result in a error(failure or something like that. I've removed the SD card as well, as I heard that might cause problems. As far as I know, I need to flash the laf.img to get into download mode, and from there on can flash via kdz.
Help please? This kind of sucks..
When you write a command, does it show on the phone?
You might need to change the driver in device manager. Look for "Android", update driver, browse my computer..., let me pick from a list, and here you'll see 3 different drivers, what you want is "Android bootloader interface"
hi
Hi dear frends.
Its sad to know that all you guys cant go to download mode or facing security error or stuck in lg logo or in fastboot mode
And some guys stuck qhsuab bulk 9008
So the solution is here.
If you are unable to get into download mode then you need to force your g3 into qhsusb bulk mode by shorting the test point.
I will help u all guys.....
I will help u to unbrick ur any lg model wothout download mode or stuck in 9008 or anytype of problem.
Please let me know your problem in pm.

Lg g3 d855 marshmallow no root, no download mode, no fastboot, detect as qualcom 9008

help me please,
lg g3 no download mode or recovery or fastboot
hi everyone, please help me to fix this lg g3
the problem is, my device has detected in device manager as qualcomm hs usb 9008
from the boarddiag, it show that my ap test, emmc, and sdram pass or in good condition
i have using boarddiag to flash aboot,primarygpt, laf etc,
the problem is after flash that thing, i still can't enter download mode, even i press vol up while insert usb cable to pc, my device still don't enter download mode, just LG logo and black screen and turn to qualcomm hs usb 9008 again, why ???
for information,
before this brick i use marshmallow, or i must use the laf of marshmallow again? because i use laf kitkat rom, 10e, if that so can you share laf.mbn from marshmallow v30b? i have laf.img from 30b but the problem i can't enter the fastboot mode to flash it
full chronology
before brick my phone is on marshmallow 30b, then my phone suddenly stuck at LG logo and don't enter the OS, after that i flash via KDZ, but stuck at 99% and i just unplug from pc, after pulled battery and connect to pc it blank and show lge androidnet serialport, then i short pin/ test point and become detect as qualcomm hs-usb 9008, after that i flash aboot, primarygpt, laf, tz , etc via boarddiag, it's successfully, but i still don't enter download mode, it just show LG logo for a moment then black lcd, and detect as qualcomm again
for information:
condition i don't root phone, and now don't enter download mode, fastboot or recovery.
please i will pay who can revive my lg g3
If your phone is furbished, you have to confirm your. Model by opening and looking at the board.
You are flashing 855 firmware but that might be any other model.

Bricked my LGG3

Hello everyone,
so here's my problem:
Wednesday morning i took my phone out of my pocket and had a blackscreen. I tried to restart it and took out the batterie but i always got stuck in the LG Logo or a bootloop. Since i had TWRP and lineage OS installed, i tried to go into the twrp menu with the factory mode (power button + volume down) but after the "double yes" i always got a blackscreen.
So i went into the internet to fix it myself. I tried the "LG Flash Tool 2014" with the kdz. reset & the other Flash tool with the tot. reset. Both didnt recognize my phone. At this point, the only thing that worked was the download mode BUT not the recovery mode that usually comes after it. It just showed the download mode for some seconds and then a black screen. Later i noticed that my phone showed as a "qualcomm device" in the device manager, and the internet said that this was bad. So i used "Board diag" and "Smart boot diag" to fix it, but at the point where the device should have restarted, and the download mode should have worked WITH the recovery mode, i always ONLY had the 6 second download mode. After messing a bit with "Board Diag" i even got it to show up as LGE AndroidNet USB Serial Port in the device manager, which apparently was even more bad and only way to go back to qualcomm was to shorten the pins which i did. And it worked BUT now i was back with the qualcomm stuff.
So as you can see, i've prety much run i circles since wednesday... Iam now at a point where 3 different thingscan happen when I try to put my LG into download mode (volume up + usb cable):
1. Its recognized as a unknown device which is constantly connecting and diconnecting, so iam assuming my phone is bootlooping with a black screen.
2. The download mode icon shows on my phone and disappears after some seconds but my pc fails to recognize it.
3. Nothing happens and the screen stays black
When i only connect the usb cable, it shows a stuck charging icon for some seconds and then goes black. Connecting without a battery shows the "missing battery icon". I tried with 2 pc's, both having the LG mobile driver 4.2 and the qualcomm driver installed AND beeing in testmode. Both don't recognize the device. I also tried 2 batteries on my phone but it changes nothing.
I have a D855. And i know that my situation is pretty f*cked but maybe someone i able to help me anyway. Thanks alot.

Dead LG G4, no recovery or EDL

Hey everyone
My LG G4 (H815) suddenly turned off when i was using it, and it showed no life when i tried to boot it up again. Its completely stock, no custom recovery or custom firmware is installed. I cant boot into fastboot or EDL mode. I tried the button combinations as well as the test point method but i just cant get it to enter any kind of recovery mode, the screen just remains black (no backlight either). I installed the Qualcomm HS-USB drivers and when i plug my phone in my pc it gets recognized by QFIL. I tried flashing the fimware but it always gives me the Sahara unable to read packet header error. Can anyone help me?
Thanks in advance.
Have you searched the forum and tried any of these ?
https://forum.xda-developers.com/t/guide-proper-h815-unbrick-through-qfil-files-included.3709212/
https://forum.xda-developers.com/t/...-unbrick-via-external-sdcard-no-qfil.3748946/
https://forum.xda-developers.com/t/lg-g4-h818p-h815-hard-brick-recovered-working.3703565/
https://forum.xda-developers.com/t/unbrick-lg-g4-9008-qualcomm-mbn-files.3574595/

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