LG D802 fastboot problem - G2 Q&A, Help & Troubleshooting

Hey guys. I bircked my LG a couple of days ago and now it's in:
[810] fastboot mode started
[860] udc_start()
I cannot enter download mode because the phone will not shut down. When pressing and holding the power off button it turns off for a mere second and then the LG logo comes up and i get into fastboot again. The phone will NOT turn off.
When I connect it to the PC it is not detected as qhsusb_bulk in device manager but as a CMCC ADB Device>CMCC Composite ADB interface.
Any help is appreciated.

zeleman1a said:
When pressing and holding the power off button it turns off for a mere second and then the LG logo comes up and i get into fastboot again. The phone will NOT turn off.
Click to expand...
Click to collapse
hold pwr button longer, don't let it go when LG logo shows... only then the device will power off completely...
after that, search on how to enter the recovery (depending on your bootloader - see dorimanx kernel thread op)

60nine said:
hold pwr button longer, don't let it go when LG logo shows... only then the device will power off completely...
after that, search on how to enter the recovery (depending on your bootloader - see dorimanx kernel thread op)
Click to expand...
Click to collapse
I think I have TWRP. When it's turned off and and i press power+volume down and then when LG logo shows i press and hold them again i get into factory hard reset.
EDIT:I don't think i have recovery set up btw.

zeleman1a said:
I think I have TWRP. When it's turned off and and i press power+volume down and then when LG logo shows i press and hold them again i get into factory hard reset.
EDIT:I don't think i have recovery set up btw.
Click to expand...
Click to collapse
if you have a twrp recovery - it will first show "factory reset", you say "yes" 2 times and it will enter twrp (it will not wipe anything)
if you have stock recovery - then don't press "yes" in the reset screen...
did you by any chance flashed a kernel recently?
fastboot error message is commonly shown when people flash the kernel which is not for their variant - and this can easily be solved with flashing the right variant kernel... (i.e. you have d802 variant and you flashed kernel for d800 variant and vice versa)

Related

[Q] Dead LG G2 Sprint

I have lg g2 sprint version. I have unlocked it by following a tutorial on youtube. On the ui there was a message that there is software update and i tapped to install it, but it was stuck on fastboot mode started udc_start() so i followed tutorial from a forum and fastfbooted boot aboot recovery and laf, but forgot to run fastboot reboot and turned off and on the phone. Now when I try to start the phone it shows the lg logo and after that only the led is flashing no matter if it's charging or not. Any ideas what to do? I have plugged it in to power it, but I am not sure whether it's charging now.
I can enter in download mode by pressing volume up and power button, but I don't have pc near me to try to flash to stock.
lolopopolo said:
I have lg g2 sprint version. I have unlocked it by following a tutorial on youtube. On the ui there was a message that there is software update and i tapped to install it, but it was stuck on fastboot mode started udc_start() so i followed tutorial from a forum and fastfbooted boot aboot recovery and laf, but forgot to run fastboot reboot and turned off and on the phone. Now when I try to start the phone it shows the lg logo and after that only the led is flashing no matter if it's charging or not. Any ideas what to do? I have plugged it in to power it, but I am not sure whether it's charging now.
I can enter in download mode by pressing volume up and power button, but I don't have pc near me to try to flash to stock.
Click to expand...
Click to collapse
The situation after a couple restarts is:
When I put to charge the lg logo appears and the led is flashing from yellow to blue
if I hold down and power button it says "Recovery mode. Loading..." and nothing happens
If I hold up and power button it enters download mode
Can I charge the phone in order to flash it to stock?
p.s. I am turning it off by holding the power button for ~20 sec

[Q] Stuck at boot after Nandroid restore

Hi
I installed FluffyRom (which is based on Simple Rom) on my D802 and everything was ok.
I was not happy with the ROM so I did a Nandroid restore of my previous install which was BlissRom
After reboot I can see the LG logo, which then flickers a bit and fades away and then black screen.
If I connect to my Windows PC I can see the internal storage. If I long press the power button, something vibrates and if I tap the screen I can shut it down so I assume that the rom is running but I do not get the visuals.
I would like to have it working again, what can I do as i don't have an idea... the only thing I found out is that the baseband has been changed by the Simple Rom install ...
BlissPop need JB baseband:
http://downloads.codefi.re/autoprime/LG/LG_G2/G2_modems
-JFK- said:
BlissPop need JB baseband:
http://downloads.codefi.re/autoprime/LG/LG_G2/G2_modems
Click to expand...
Click to collapse
Thanks but I was wondering how I can flash anything in my case... I have a black screen and the button combo for recovery does not work....
laboratik said:
Thanks but I was wondering how I can flash anything in my case... I have a black screen and the button combo for recovery does not work....
Click to expand...
Click to collapse
Have you tried either of the following:
Download Mode
Power off your G2.
Hold Volume Up and plug your G2 into PC via USB cable, keep holding Volume Up until your G2 displays "Download Mode".
If in Download Mode follow this tutorial.
Recovery Mode
Power off your G2.
There's 2 possible options to access Recovery depending on your current Bootloader.
JellyBean Bootloader
Hold Power+Volume Down, when the LG Logo appears let go of Power+Volume Down and again hold Power+Volume Down.
KitKat Bootloader
Hold Power+Volume Down, when the LG Logo appears let go of Power+Volume Down and hold Volume Up+Volume Down.
Yes, to power off your phone, long press power button for 15sec.
Then enter recovery with vol down + power like @d00lz say.
(Hold Power+Volume Down, when the LG Logo appears relaise Power+Volume Down and press again Power+Volume Down.)
LG G2 Recovery and download mode*: https://youtu.be/ifi-ArGeTzQ
Or adb reboot recovery
_____________________________________Read more write less and be smart
siggey said:
Or adb reboot recovery
_____________________________________Read more write less and be smart
Click to expand...
Click to collapse
thank you guys for the assistance but finally found what I needed to do here
phew, nevere ever flash anything based on simplerom....

LG D802/G2 cannot enter recovery mode at all

Hello
I am having some trouble with my LG D802 i been trying to recover phone but it refuses to enter recovery mode, the phone does show lg logo so phone isnt dead but i cannot enter recovery mode no matter what i do i pressed power and volume down until lg logo was displayed then i let go and pressed them both again but nothing happens lg logo appears again and phone goes black again no recovery page, has anyone an idea what coukd cause this as its very frustration and i need to recover phone urgently
graemek said:
Hello
I am having some trouble with my LG D802 i been trying to recover phone but it refuses to enter recovery mode, the phone does show lg logo so phone isnt dead but i cannot enter recovery mode no matter what i do i pressed power and volume down until lg logo was displayed then i let go and pressed them both again but nothing happens lg logo appears again and phone goes black again no recovery page, has anyone an idea what coukd cause this as its very frustration and i need to recover phone urgently
Click to expand...
Click to collapse
does it boot into system? not .
you tried all different ways pressing the keys.?
you may need to use skr tools to install twrp..
Try press Volume Up + Volume Down after the LG logo appears (this must happen only if you first press Power + Volume Down to power on the phone and get the LG logo)
raptorddd said:
does it boot into system? not .
you tried all different ways pressing the keys.?
you may need to use skr tools to install twrp..
Click to expand...
Click to collapse
The phone boots up but keeps rebooting itself which is why i was going to factory reset it i have tried all conbinations cant enter downlod mode either and usb debugging isnt enabled so i cant use skr tools but its original rom also

rebooting into TWRP help

Quick question for all. Have TWRP installed, rooted all good.
Trying to reboot into recovery when power is off. I read to hold down vol down and power until LG pops up then let it go then hold it again.
I do that, then the bootloader screen pops up. What do I do, I'm lost!!
dfogelstrom said:
Quick question for all. Have TWRP installed, rooted all good.
Trying to reboot into recovery when power is off. I read to hold down vol down and power until LG pops up then let it go then hold it again.
I do that, then the bootloader screen pops up. What do I do, I'm lost!!
Click to expand...
Click to collapse
Just download quick reboot (root) from playstore and reboot to twrp with the phone on
dfogelstrom said:
Quick question for all. Have TWRP installed, rooted all good.
Trying to reboot into recovery when power is off. I read to hold down vol down and power until LG pops up then let it go then hold it again.
I do that, then the bootloader screen pops up. What do I do, I'm lost!!
Click to expand...
Click to collapse
ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!!
While the device is powered off, press and hold Vol - and Power button. When you see the LG logo quickly release only the power button and re-press and hold the power button (Never let go of the Vol - button) This will boot you into the LG Factory reset screen. ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!! Choose yes to both options and you will be rebooted into TWRP. TWRP intercepts this command and ignores the factory reset part.
There's a nice app in the Playstore by the same guy that makes 3minit battery called 3minit rebooter. Free and works awesome to reboot recovery.
https://play.google.com/store/apps/details?id=three.minit.Rebooter
or, use adb on your computer and do "adb reboot recovery" - it is the most reliable method for me
DarkestSpawn said:
ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!!
While the device is powered off, press and hold Vol - and Power button. When you see the LG logo quickly release only the power button and re-press and hold the power button (Never let go of the Vol - button) This will boot you into the LG Factory reset screen. ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!! Choose yes to both options and you will be rebooted into TWRP. TWRP intercepts this command and ignores the factory reset part.
Click to expand...
Click to collapse
love you man, saved my ass
Need some help here. Stuck on LG logo after the red triangle screen. ( unit was rooted using emdroidle method - H990DS ). Can't seem to access TWRP.
I tried flashing the superv20 rom but made some mistakes, TWRP version was on 3.0.2 and secure startup was enabled. managed to access TWRP and updated it to latest version then now Im stuck on LG logo after I reflashed the superv20 rom.
DarkestSpawn said:
ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!!
While the device is powered off, press and hold Vol - and Power button. When you see the LG logo quickly release only the power button and re-press and hold the power button (Never let go of the Vol - button) This will boot you into the LG Factory reset screen. ONLY USE THIS METHOD IF YOU HAVE TWRP INSTALLED!!!!! OTHERWISE YOU WILL FACTORY RESET YOUR DEVICE!!!!! Choose yes to both options and you will be rebooted into TWRP. TWRP intercepts this command and ignores the factory reset part.
Click to expand...
Click to collapse
The same method helped me get into recovery. Just remember to let go of the power button for around a sec before repressing it again.

LG G6 (H870) stuck on boot screen after twrp flash

Hey everyone,
so here's my situation:
I unlocked the bootloader for my G6
I activated USB debugging and OEM unlock in developer options
I then flashed TWRP 3.4.0-1
Now the phone is stuck on the boot screen, when I hard reset (power button + volume down, then pressing power button again when G6 logo appears, then selecting "factory reset" and "yes" twice) the phone does not boot into TWRP but instead goes to the boot logo again and nothing happens. I tried leaving it for a while and it stayed like this until the battery ran out. When I plug it in, it starts the same procedure immediately. When I connect it to my pc, I cannot manage to flash anything because I can't boot into bootloader because the phone is not detected (my pc doesn't play the usb plug-in/unplug sound).
So my question really is: Did I kill my G6 since I am unable to flash anything or is there still an option to get bootloader running again? And yes, I did try the unbrick method under https://forum.xda-developers.com/lg-g6/how-to/lg-g6-unbrick-method-t3935924 but I get stuck at the point where you need to click "download" because my phone is not detected. I also heard about the method of shorting the pins beneath the flash but I don't know how to do that...
Any help is appreciated.
Hi,
I had the same problem and finally solved it by using the release of TWRP found here : https://forum.xda-developers.com/t/recovery-twrp-3-1-x-stable-official.3627595/
After flashing TWRP I followed those restarting steps :
Hold vol down + power for 10 seconds and your phone will power off.
Hold vol down + power / release power when the LG logo appears and then immediately hold power until the Factory Menu start
Menu select Yes
Confirm Yes
TWRP boots
Hope this will help
Edit : A more recent version of TWRP compatible with LG G6 is available here : https://forum.xda-developers.com/t/recovery-twrp-v3-2-3-1-for-h870-h872-us997-unofficial.3828254/

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