Develop Bugs

Stuck in cwm boot loop, help plz

I have LG optimus g pro E988 (India) , rooted and installed debloted rom from anirudh, done so many stupid things with my phone but never bricked it but my phone model number is changed and now its E980, i was bored with my jb so think about update it to KK so i go to cwm and restore the stock lg rom which was also rooted then hit update and after my phone downloaded update i m stuck in cwm boot loop, did every thing but nothing work because my phone driver is not matching because it is now E980...... i tried to connect adb to delete fota files but there is no adb devices in list, Please help if u can and sorry for bad english.
i tried to fallow this link-
http://forum.xda-developers.com/optimus-g-pro/general/guide-how-to-solve-stuck-cwm-twrp-t2852103

No success yet.
Tried to use LG mobile support tool to go back to stock but no success, what weird is in LG mobile support tool my phone shows as E988(Correct) when i connect with download mode on but when i m in cwm and try to connect to pc in device manager it shows as E980 and yellow exclamation mark. if i can connect to adb, my problem would be solve but how????? can anyone help?????:crying:

No upgrade item to fix
In lg mobile support tool when i try to upgrade recovery it says no upgrade item to fix, help me guys i cant fix my phone yet:crying:

If you're still stock at the cwm loop, try flashing cwm again with a cwm.zip file. That works for me every time when I get stock in the recovery loop.
Edit: Besides flashing the recovery zip file, you also need to flash your ROM and gapp from within the new recovery you just flashed.

yourseone said:
Tried to use LG mobile support tool to go back to stock but no success, what weird is in LG mobile support tool my phone shows as E988(Correct) when i connect with download mode on but when i m in cwm and try to connect to pc in device manager it shows as E980 and yellow exclamation mark. if i can connect to adb, my problem would be solve but how????? can anyone help?????:crying:
Click to expand...
Click to collapse
That is correct, get an ADB working folder in your computer (or download it from Google) and push a ROM with it, search for the commands on how to push a ROM through ADB, I'm not at home or else I'll point it to you step by step, try it on yourself and let me know if you need additional help.

Working now (Fixed)
Fixed it by flashing KDZ
First Method - http://forum.xda-developers.com/showthread.php?t=2420219
Also Thanks for replying guys, I thought OG Pro community is dead, but after searching for lot about it i found the solution. XDA Rocks ..... :good:

[Q] Stuck at fast boot LG G3 F400L

Hi all,
Long time user first time posting a thread [sorry couldn't help myself]
Anyway I have a LG G3 F400L and I accidentally installed D855 rom on to it [AndroidNow_HD_8.0_Lollipop].
I have tried flash tool to flash the correct firmware but to no effect it now detects it as D855, so I cant install the F400L firmware using the F400L dll. I am installing an older firmware i.s 10e I have also tried 20f for F400L but the new flash tool doesn't recognize my phone, I have tried different USB ports and a different PC with Windows 7 32bit still nothing.
I am using Windows 8.1 64bit.
Regards and thank you for the help.

Anyone, please help.

Use cwm or any other recovery backup to restore

akashvermaofskt said:
Use cwm or any other recovery backup to restore
Click to expand...
Click to collapse
Thank you for the response. I do not have access to recovery, only download mode works.
Update: I have tried using a general Dll to flash TOT file via flashtool but it doesn't let me error CrossDl [D855] to [F400L].

I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:http://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Please make sure you download the correct TOT file for your phone.
http://downloadandroidfiles.org/Files/LG G3/Stock Files/

SaharLevi said:
I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:
Please make sure you download the correct TOT file for your phone.
Click to expand...
Click to collapse
Thank you that did work sort of, I was doing the same thing but someone in the comments referred to a modded DLL for the flash which did the job to some extent at least.
Its back to stock but stuck at McAfee activation, requires a pin which I do not have nor have ever created one, and now a Kill switch has been engaged and no more download mode. Out of the fire into the frying pan is what I feel like right now 100hours and 33mins without my G3, but who is counting.

That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?

SaharLevi said:
That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?
Click to expand...
Click to collapse
Nothing, no download mode or recovery. Boots up asks for language selection and then McAfee pops up of PIN. I am talking to McAfee support hopefully they can help.

Goodluck with that!

Thank you all.
Finally fixed. Just needed to be quick, the McAfee app gives you about 30 secs to do your thing then it pops up for pin. I opened up the McAfee app -> setting and changed the pin .

Can't fix after install twrp

Hi everyone so i tried installing twrp on my lg g pad 8.3 4.4.2. v50020d
And i kept getting the same error when trying to go into recovery.
So i thouth i could fix it and go back to normal with lg support tool but everytime i use lg support tool it stuck on 4% after the tool downloaded the nessesary files first i tougth that i could be that i didn't have enauth space on my device so i i did a factory reset but that made everything wors every time i try to boot my device now it goas automaticly to recovery but there is no recovery to go to .
So i puted my g pad in download mode and tried fixing it with the lg support tool but it still stuck on 4% and asks me to retry after i reboot my device.
sup
I really need help can anyone help me with this problem.
I cannot boot into the os or recovery only thing that happends it try to go into recovery.
The only thing that it can do is go into download mode and lg support tool recognises my device
Sorry for my english i din't pay much attention to my writing i'm a bit frustrated.

Nevermind found a way to fix it aqtuelly its the same way just used like a very old laptop to do it I for some reason couldn't fix it on my newer laptop so had to use an old one, I also managed to install twrp by downgrading my firmware and then installing twrp on it using the same old laptop so yeah it depends a lot on what computer your using

Hard Bricked D850PR

So the story goes as this:
ATT G3 accidentally flashed a D851 rom... phone rebooted now its a hard brick
I have tried every method to restore it to stock (lg flashtool 2014 and old flash tool method, tried enter TWRP nothing happened)
My phone is detected as it were in Download mode, but it doesnt let me flash anything.
I downloaded the "generic" LGUP8794.dll and tried to flash stock D850 and stock D851, jeez I even tried to flash LS990 stock rom... same error every time.
Downloaded stock D850PR20A_01.kdz and tried to flash it through Flashtool 2014 and just getting error...
I'm really out of options now.
I dont have warranty so its out of question the "return my phone" thing.
Thanks in advance for any reply or suggestion.
PD: I get no "QHUSB" or "fastboot" mode either.

Try using a different usb port. LG flash tool hates USB 3.0 so use USB 2.0

speedyjay said:
Try using a different usb port. LG flash tool hates USB 3.0 so use USB 2.0
Click to expand...
Click to collapse
I have tried with 3 different computers, one with XP, Win7 and win8.1
I never use USB3.0 unless its with a memory stick

Can you go into download mode??
Sent from my SM-N910F using XDA Free mobile app

No, No Download mode, but my phone is connected as it were in download mode.
My screen is good, I know cuz when i connect the usb without battery it lights up and shows an image of "missing batt"
No TWRP either

Any update on this? I just rooted my D850PR and then used AutoREC to install TWRP, then I turned it off to reboot but it never booted...it also lights up the display when connecting the USB cable without the battery but that's all it does

gretschpr said:
Any update on this? I just rooted my D850PR and then used AutoREC to install TWRP, then I turned it off to reboot but it never booted...it also lights up the display when connecting the USB cable without the battery but that's all it does
Click to expand...
Click to collapse
Dos your computer recognize the phone as qhsusb_bulk?
Sent from my SM-G925T using Tapatalk

i cant believe there is no clear solution for the LG G3 brick.

There is a solution
I have faced this issue with my LS990. accidentally flashed D855 ROM then bricked. THere is a unbricking method which is very hard and you have to do it with patience.
Try this
http://forum.xda-developers.com/lg-g3/general/unbrick-lg-g3-qhsusbbulk-qualcomm-9008-t3072091
You might want to short 2 pins of G3 motherboard. message me if this method didn't work.
Good luck matehttp://forum.xda-developers.com/lg-g3/general/unbrick-lg-g3-qhsusbbulk-qualcomm-9008-t3072091

I had that problem, flashed d855 rom on a d850pr, and it went into bootloop, but I just went into recovery, flashed a D850 rom and everything worked fine. I did have your problem once, but with a LG Optimus L2, I tried on windows 8 and 7 but the LGflashtool always stop with errors, until I tried on XP, i could restore it. (sorry for the english)

Fixed hard brick LG G3
This post fix my hard brick problem with LG G3 D850PR:
https://forum.xda-developers.com/att-lg-g3/general/downgrade-lg-g3-d850-to-kit-kat-t3437524
The files I used:
https://dl.xda-developers.com/3/5/0/4/2/8/9/LGUP8974.zip?key=FPUbu3eormslai-eelpOBw&ts=1499518278
http://qc2.androidfilehost.com/dl/d...IN_LGD850AT-01-V10d-310-410-JUN-19-2014-0.zip
http://qc1.androidfilehost.com/dl/c...8065/95916177934528569/Setup_LGFlashTool.zip?

LG G3 Cat.6 Bootloop and unknown device in Download Mode

Hi guys,
Please bear with me as I'm new to this scene.
My LG G3 Cat.6 (F460L) is currently stuck in bootloop, can't enter recovery mode as well but it can go through download mode but my PC won't recognize it (tried different usb cables and tried it on another PC, still no luck). I made an error when I was trying to flash twrp into recovery but accidentally flashed it to boot (I was quite unsure about what I did but I think I flashed a wrong version of twrp for recovery and tried to reflash the right version but accidentally flashed it to boot, if that made sense). I was able to get into the factory wipe screen and after pressing yes it goes right into bootloop again. Was also able to get into another screen with turn on, turn off and cancel options but I'm not sure what it does because it's all in korean. My PC can't recognize my device right before this happened so I think that explains why it also can't recognize it while in download mode. I saw something about Qualcomm stuff but I'm unsure as to how it is done (the shortpin part) and i don't think my PC would even recognize it as it can't even recognize my device in the first place (faulty micro usb port I guess). Any fix that you guys can think of? Thank you very much!