Develop Bugs

LG G3 D855 secure booting error !!

hello All
i did something very very very bad
i was upon to downgrade my D855 from 5.0 to Kitkat but it stop on 17% in pc and 0% on the phone
it still like that for 40 min so i unplug USB and i restart the phone i just get message says (secure booting error) in the up left side of phone and after that black screen and LED (BLUE & RED) i can not get in to download mode but when i try i get this :
Qualcomm HS-USB QDLoader 9008 (COM41)
and when i try to enter to recovery mode i get had to do factory reset and same problem !
so anyone can help me with this ?
Thanks ..

any help plz

Hello.
Move your battery, then replace it.
Flash an official kdz from lg.com with LGflashTool and your phone will restart

Your device is Brick!!
Try to enter Download mode
Flash your device again with LG FLash tools(tot File) or KDZ

i found it holllllaaa
for everyone have this problem, on this link you can fix it
http://forum.xda-developers.com/sprint-lg-g3/general/guide-fix-hard-brick-recovery-guide-t3132359

i used KIZ file by the way
and i wish frm supervisor to close this subject and write solved on it
thanks.

LG G4 H815 hardbrick (qhusb dload 9008 error )

LG G4 H815 hardbrick. when connect to pc it show error qhusb dload 9008 error, some time start and firmware update seen to be,
this happened when installing a custom rom for Marshallow over Lollipop.
Any solution? guidance? help?

You can guide this post (warning: that the firmware must itself be according to your exact model): Here
Good Luck.

thanks i follow the guide and choose h815 Europe OPEN H81510D.kdz,
but the download mode converts into blank screen while sw updating till about 9%
any clue?

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.

my lg h815 showing qualcomm 9008 mode :( any solution yet?

i was trying to update my lg g4 h815 to mm by LGUP tool after flashing file device rebooted then it never turn on. i remove battery and put back again and try to turn on but no use. it showing me qualcomm 9008 mode on device manager... please help me!

Hard bricked F400L

Hi all
It all happens after the screen was suddenly froze and having to take the battery out.
When turned on, the phone had a red/blue led problem.
It was first solved using the LGFlashTool V1.8.6.527 to flash in the LGF400LAT-00-V10a-LGU-KR-MAY-18-2014-0 tot. The phone was reverted to the original firmware and was functional.
Then I wished to upgrade to the latest stock fw (F400L30c_00_1217) using LG Tool 2014. Unfortunately this buggy program prompted connection to server failed and the text was messed up with ????? in the pop up LGUserCSTool window. It was force closed by the system so the whole process could not be completed. I pulled out the battery again(which I now think that I shouldn't do) and after restarting the download mode was ruined.
I tried to fix it using the short pin method here and if rescued would re-flash the tot using the LGFlashTool.
The problem is LGFlashTool did not allow me to do it this time with Model Information Check Fail just like others in this forum https://forum.xda-developers.com/lg-g3/help/model-information-check-fail-t3163715
Having received the message "Model Information" fail, I thought it was due to the firmware version mismatch so I decided to give the LG Tool 2014 a try, again.
I was learnt to ignore the connection fail message to let it run in the background.
However, this time it ended up at around 65% and now the download mode has gone.
Each time the power+vol up combination ends up being detected as qhsusb_bulk, a.k.a Qualcomm HS-USB QDLoader 9008
Not sure if the pins were physically damage during the shorting.
I have a thought. Is there any tool to convert kdz -> tot?
I know there is one to extract the bin, dz from kdz but I need tot to use in the boarddiag (as I think maybe the v30c firmware information has written into the phone by LG tool causing the LGFlashTool V1.8.6.527 to reject writing in)
What is the boarddiag for? Is it performing the same as adb/fastboot to erase/flash partition?
Or are there any workouts?
Thanks for reading and helping me.

it's so weird...yesterday it was stuck at qhsusb_bulk mode
so after placing for a day, it was detected as ABD interface today
and it was booted into fastboot mode.
I managed to erase partition but not flash..tried fastboot boot twrp.img
it restarted with a black screen and this time was detected as lge AndroidNet USB Serial Port
have tried the lg flashtool but no luck
Followed by that, I had applied the short pin method to restore the partitions again..
afterwards, i could manage to get in qhsusb_bulk only...
lets see if it could be in ABD interface tomorrow
btw, any ways to fix the download mode by the fastboot method given the bootloader was locked?

I was finally able to reflash using the tot file
but after flashing the phone reboots into black screen with flashing blue/red led just like previously(bricked status)
the phone was unable to connect as LGE AndroidNet USB Serial Port too
therefore, the flash tool could not complete
any idea for a fix?

my lg g3 f400s bricked
funhk said:
Hi all
It all happens after the screen was suddenly froze and having to take the battery out.
When turned on, the phone had a red/blue led problem.
It was first solved using the LGFlashTool V1.8.6.527 to flash in the LGF400LAT-00-V10a-LGU-KR-MAY-18-2014-0 tot. The phone was reverted to the original firmware and was functional.
Then I wished to upgrade to the latest stock fw (F400L30c_00_1217) using LG Tool 2014. Unfortunately this buggy program prompted connection to server failed and the text was messed up with ????? in the pop up LGUserCSTool window. It was force closed by the system so the whole process could not be completed. I pulled out the battery again(which I now think that I shouldn't do) and after restarting the download mode was ruined.
I tried to fix it using the short pin method here and if rescued would re-flash the tot using the LGFlashTool.
The problem is LGFlashTool did not allow me to do it this time with Model Information Check Fail just like others in this forum https://forum.xda-developers.com/lg-g3/help/model-information-check-fail-t3163715
Having received the message "Model Information" fail, I thought it was due to the firmware version mismatch so I decided to give the LG Tool 2014 a try, again.
I was learnt to ignore the connection fail message to let it run in the background.
However, this time it ended up at around 65% and now the download mode has gone.
Each time the power+vol up combination ends up being detected as qhsusb_bulk, a.k.a Qualcomm HS-USB QDLoader 9008
Not sure if the pins were physically damage during the shorting.
I have a thought. Is there any tool to convert kdz -> tot?
I know there is one to extract the bin, dz from kdz but I need tot to use in the boarddiag (as I think maybe the v30c firmware information has written into the phone by LG tool causing the LGFlashTool V1.8.6.527 to reject writing in)
What is the boarddiag for? Is it performing the same as adb/fastboot to erase/flash partition?
Or are there any workouts?
Thanks for reading and helping me.
Click to expand...
Click to collapse
you need to heat your processor to open download mode