Database Users

[Q] Clean Rom won't boot on new G2

Hi All,
I just rooted and put the latest TWRP on my new Verizon G2.
I installed clean rom 1.0 and the install finished succesfully. when trying to reboot for the first time after install, I'm stuck at a black window immediately after the LG logo splash screen, which only has the following information in small writing in the upper left corner:
[810] Fastboot mode started
[860] udc_start()
I can't seem to get past it and can't get back into the recovery. Any ideas? I'm stuck without a working phone right now.
Thanks very much!

Did you flash the one for the Verizon phone?
Sent from my VS980 4G using XDA Premium 4 mobile app
---------- Post added at 03:02 AM ---------- Previous post was at 02:59 AM ----------
If you flashed the one in the op then I believe you need to flash back to stock because that one in the op is not intended for Verizon. His link has been down for quite some time now. But head over to general forum and look for Verizon back to stock... Takes about 30 mins to get it all setup and done. Then reroot
Sent from my VS980 4G using XDA Premium 4 mobile app

What method used for root and recovery?
What method are using to flash ROM?
You check all your md5s?
Sent from my VS980 4G using xda app-developers app

Full clean etc
Did you:
a) nandroid backup
b) factory reset
c) clear caches
d) install rom
(standard procedure I realize)

Thanks for all the replies guys... appears to have been a bad download. Haven't had one in a long time so I was lazy checking the MD5s last night.

Solution
ahughes5 said:
Hi All,
I just rooted and put the latest TWRP on my new Verizon G2.
I installed clean rom 1.0 and the install finished succesfully. when trying to reboot for the first time after install, I'm stuck at a black window immediately after the LG logo splash screen, which only has the following information in small writing in the upper left corner:
[810] Fastboot mode started
[860] udc_start()
I can't seem to get past it and can't get back into the recovery. Any ideas? I'm stuck without a working phone right now.
Thanks very much!
Click to expand...
Click to collapse
Just repaired this at my shop by taking off the back of the phone & back plate above the battery & unplugging the battery.
turn on LG Mobile support tool
Go to Options & select upgrade recovery
Plug back in battery & press volume up while plugging phone into computer to trigger download mode
Let the LG Mobile support tool work & reload the operating system
Good Luck

Black screen on recovery boot

So I rooted my g2 then I used clockwork mod app to install recovery. Well I booted to recovery and it's just sets at a black screen. When plugged into a computer it pops up to format like 30 drives. I have tried the recovery batch file for cwm and it results in the same thing. Tried flashify and flashing twrp and still have the same thing. Please I have no idea what else to do.
Sent from my LG-D800 using XDA Premium 4 mobile app

Please delete didn't mean to post a reply

any luck?

I have the same issue, have yet to find a solution either.
Sent from my VS980 4G using xda app-developers app

I ended up flashing back to stock and then rooted with ioroot15 and then followed these instructions http://www.android.gs/install-twrp-recovery-lg-g2/ It worked.
But me being an idiot didn't take my titanium backup off the phone before the flash so I lost all my settings. #draganddrop #oopsies
Sent from my VS980 4G using Tapatalk

Same here!!!
krypticos said:
So I rooted my g2 then I used clockwork mod app to install recovery. Well I booted to recovery and it's just sets at a black screen. When plugged into a computer it pops up to format like 30 drives. I have tried the recovery batch file for cwm and it results in the same thing. Tried flashify and flashing twrp and still have the same thing. Please I have no idea what else to do.
Sent from my LG-D800 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
i am having the exact same issue. i rooted and installed cwm and flashed cm-11 i tried using flashify to go into recovery and i get black screen. when i hold power and volume lg screen pops up then goes to black screen. i tried using the lg tool and it freezes and gives error at 49%. please help i cant get back to stock.

i'm having the same problem. i installed cwm and twrp and they both give me a black screen with a bunch of drives in windows after recovery. how do i fix this? VS98012B
Thanks

well i neither use twrp or cwm recoveries i use phils unofficial cwm recovery witch i think is better and faster than the other 2 you can try it http://forum.xda-developers.com/showthread.php?t=2201860

endleesss said:
i'm having the same problem. i installed cwm and twrp and they both give me a black screen with a bunch of drives in windows after recovery. how do i fix this? VS98012B
Thanks
Click to expand...
Click to collapse
Hello,
I am on VS98012B as well. I rooted with 'ioroot24' .. That all went fine. Now when I am trying to install a custom recovery (got botched the first couple times) ... now I can not get the phone to pop up the RSA fingerprint and when I try to boot into recovery using ADB commands or quickboot the phone just goes to a black screen and if it is plugged into the computer (windows 7) it pops up a bunch of different drives at me like endleesss was having. I could use and would appreciate some pointers!
Thanks!

kaluna00 said:
Hello,
I am on VS98012B as well. I rooted with 'ioroot24' .. That all went fine. Now when I am trying to install a custom recovery (got botched the first couple times) ... now I can not get the phone to pop up the RSA fingerprint and when I try to boot into recovery using ADB commands or quickboot the phone just goes to a black screen and if it is plugged into the computer (windows 7) it pops up a bunch of different drives at me like endleesss was having. I could use and would appreciate some pointers!
Thanks!
Click to expand...
Click to collapse
I am getting this exact same problem, I used ioroot25, which also went fine. When I go to reboot into recovery I just get a black screen. When I boot into recovery with it plugged into my computer I also get Windows telling me that I need to format a bunch of drives before I can use them. I also get one drive that lets me open and it has a "images" folder in it, with a bunch of other files inside that. Not sure what is going on but any help would be awesome.

hoofe said:
I am getting this exact same problem, I used ioroot25, which also went fine. When I go to reboot into recovery I just get a black screen. When I boot into recovery with it plugged into my computer I also get Windows telling me that I need to format a bunch of drives before I can use them. I also get one drive that lets me open and it has a "images" folder in it, with a bunch of other files inside that. Not sure what is going on but any help would be awesome.
Click to expand...
Click to collapse
Seeing this exact same thing after going to a 4.4.2 ROM. I was coming from a 4.2.2 with TWRP 2.7 and now cannot get back in to recovery mode. I get just a black screen and also see the multiple drives popup when I plug in USB to the pc. I've tried flashing different recoveries with no luck. Hope a fix for this can be found.

Same problem but worse
I have this problem as well and have known that it needing fixing. Problem is the phone tried to auto-update to kitkat at night and now all i get is lg logo some commands in the top left then it tried to install via stock recovery. I can't get away from this as far as I know yet. I can't get to dl mode to just flash stock. I feel i might be completely boned. I tried pulling the battery ribbon to see if that would kick it out of this commanding it into recovery but I really don't know what to do at all at this point. Can someone help please or atleast tell me im boned so i can try to salvage. maybe do a warranty replacement. Thanks in advance

This thread will help with the "drives popping up", "black screen" etc..
--------------------------
For the ones with fastboot issue who can't enter dload mode:
download yor corresponding laf.img
Download this
extract it, put your laf.img inside(rename laf.bin to laf.img if needed), run "run this", you should be able to boot to download mode.

bender_007 said:
This thread will help with the "drives popping up", "black screen" etc..
--------------------------
For the ones with fastboot issue who can't enter dload mode:
download yor corresponding laf.img
Download this
extract it, put your laf.img inside(rename laf.bin to laf.img if needed), run "run this", you should be able to boot to download mode.
Click to expand...
Click to collapse
I was able to follow all of the directions in that post though it doesn't seem to have done the trick. I have left a post in that thread asking their opinion on things but idk if it will be answered since it is such a large post.
If you have any experience with these partitions, could you direct me to a way to stop the device from trying to run the OTA. This seems to be the largest problem as to why its not working since it pushes itself into recovery every boot, though it seems the recovery partition flash didn't take for some reason.
I am using 64-bit Ubuntu could that be an issue?

help me
my lg g2 got black while i was trying to install rom when i turn on it its screen got black noting show no logo no recovery mode noting :crying: plzzzz help meeeee plzzzz any body plzzzzzzz

[Q] Help please!!! I think I brink my phone

I was trying to OTA after rooting my phone and custom recovery. I am stuck as
secure booting unsuccessful
Cause:
I don't know what to do. Any help will be appreciated. I tried to install custom stock G2 using this
http://forum.xda-developers.com/showthread.php?t=2432476

Here is a tread that has what u need... It was in the android dev section. http://forum.xda-developers.com/showthread.php?t=2451696
Sent from my LG-D800 using Tapatalk

BeGrateful said:
Here is a tread that has what u need... It was in the android dev section. http://forum.xda-developers.com/showthread.php?t=2451696
Sent from my LG-D800 using Tapatalk
Click to expand...
Click to collapse
I am not getting that error. I had that problem before, but this is totally different. I get LG red screen then I get this error:
secure booting unsuccessful
Cause:
and then this keep happening. I can go in to firmware update. Nothing much. I tried to use LG g2 stock guide, but no luck either.

When I thought I bricked mine I tried using this
http://forum.xda-developers.com/showthread.php?t=2432476
Its tricky but it worked for me when I couldn't get past bootloader. All you need to be able to do is get into download mode.
Just FYI don't ever take OTAs after flashing custom ROM. They never seem to turn out well.
Sent from my LG-D800 using Tapatalk

BeGrateful said:
When I thought I bricked mine I tried using this
http://forum.xda-developers.com/showthread.php?t=2432476
Its tricky but it worked for me when I couldn't get past bootloader. All you need to be able to do is get into download mode.
Just FYI don't ever take OTAs after flashing custom ROM. They never seem to turn out well.
Sent from my LG-D800 using Tapatalk
Click to expand...
Click to collapse
I tried that too. When I tried that yesterday, It was working, but right now, doing same process seems doing nothing in my device. I can see whole process in computer, but nothing happens device.

Can u get your phone into download mode?
Sent from my LG-D800 using Tapatalk

lipitor25 said:
I was trying to OTA after rooting my phone and custom recovery. I am stuck as
secure booting unsuccessful
Cause:
I don't know what to do. Any help will be appreciated. I tried to install custom stock G2 using this
http://forum.xda-developers.com/showthread.php?t=2432476
Click to expand...
Click to collapse
dude u got custom recovery...boot into there....use adb to push another rom to your phone.
P.S post in Q&A genius

Thank you guys.. I got in to recovery mode and install my back up. Don't know how i got in to recovery mode. I kept pressing different combination. Once again, thank you.

Bricked in a weird way
I think I bricked my phone in a similar way except I can't get into download mode or anything the only thing I can do is go into the hardware control mode and the factory reset mode when I try to factory reset it scrolls on the top right something about boot certification then it disappears and i get a black backlit screen and can do nothing

syfulus said:
I think I bricked my phone in a similar way except I can't get into download mode or anything the only thing I can do is go into the hardware control mode and the factory reset mode when I try to factory reset it scrolls on the top right something about boot certification then it disappears and i get a black backlit screen and can do nothing
Click to expand...
Click to collapse
Hey sorry to hear. I went to reset screen I guess by pressing vol down button (Search online because I was keep pressing combination, so don't know exact combo. Press power button to continue and it will take to recovery screen for TWRP. Then install recovery from back up. Mine started working fine.

[Q] Bricked Phone, need help

Hey all,
I recently was playing with some ROMs with my LG G2, seeing which was the best for me, and along the way, I messed up and now I am stuck in a fastboot screen, with nothing but a little bit of white text on a black background that says "Fastboot mode started, udc_start()". I have no clue what to do, and I really need some guidance. I played around for a bit and now I believe the phone is completely wiped. Can anyone help?

bump, can anyone help? Im dying here.

Hold down power for 15 seconds. Then hold power and volume down till white screen appears. Press power 3 times. Should be in recovery now if you had recovery installed.
Sent from my LG-D802 using Tapatalk

If this does not work you can revert to stock by downloading orginal firmware in .kdz format and flash it with Flashtool

Siinestar said:
Hey all,
I recently was playing with some ROMs with my LG G2, seeing which was the best for me, and along the way, I messed up and now I am stuck in a fastboot screen, with nothing but a little bit of white text on a black background that says "Fastboot mode started, udc_start()". I have no clue what to do, and I really need some guidance. I played around for a bit and now I believe the phone is completely wiped. Can anyone help?
Click to expand...
Click to collapse
help.. i tap something that i forgot in ... may be in "##4433386368# - Developer menu*" or somewhere(Sprint Dialer Codes) now i can't connect to my computer... i'm not allowed to post ... so ....anyone can help me ?

You need to first download the kdz and lg flash utility with drivers.
Install drivers
The factory reset deleting system, cache, internal sd.
Then shutdown your g2.
Start to downloaded mode connecting your g2
Flash kdz & voila... Done
I too bricked my phone before. My flashing stuck at 49%. Recovered using above method, all is well now
This works 1000%. I bet on it. Just remember to wipe the phone completely before flashing. You will return to stock with unrooted status in download mode. U will have your warranty back too
Sent from my LG-D802 using XDA Premium 4 mobile app
Sent from my LG-D802 using XDA Premium 4 mobile app

Boot Certification Verify?

Hi guys, need some help deperately please.
I've got an LG G2 D802 that has received the OTA update to 4.4 and is running fine.
I've since rooted it and i was looking at installing a custom recovery before flashing a new Rom......
I have tried to use Flashify after downloading TWRP recovery through Flashify but after rebooting it comes up with the following in the top left of a black screen;
Error: Boot Certification Verify
810 - secure booting error
860 - cause: boot certification verify
Then the screen goes off, ive left the phone and tried to reboot by just holding down the power button for 10 seconds but on boot i just get the same message then it dissapears and i get a black screen again
Any help or pointers would be great - thanks in advance

Try going to download mode and flash your kdz.
Sent from my LG-D802 using XDA Premium 4 mobile app

bender_007 said:
Try going to download mode and flash your kdz.
Sent from my LG-D802 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thankyou for the reply - Any chance you could link or give me a quick tutorial on how to do this please?
I've connected the lg g2 up to my pc via usb and held down volume up and power to get into download mode - i get the screen on the lg with 'Firmware Update' on it and a bar with 0% on it and writing that says "DO not unplug the USB connection until the process is complete.
I've located the kdz for my particular device/model and downloaded it on my pc - how do i flash to my phone from here please - simple step by step instructions would be great thanks!

Of course. Please read this thread and if any troubles occure write here
P.S. disable Antivirus before proceeding.

bender_007 said:
Of course. Please read this thread and if any troubles occure write here
P.S. disable Antivirus before proceeding.
Click to expand...
Click to collapse
Thanks ever so much for your help - my phone is back alive but lost its root! But because the lg g2 is so easy to root its no problem!
Thanks again my friend - you are worth your weight in gold - all the best

wolverine73 said:
Thanks ever so much for your help - my phone is back alive but lost its root! But because the lg g2 is so easy to root its no problem!
Thanks again my friend - you are worth your weight in gold - all the best
Click to expand...
Click to collapse
Thank to the thread OP where all the infos are
Sent from my LG-D802 using XDA Premium 4 mobile app

bender_007 said:
Thank to the thread OP where all the infos are
Sent from my LG-D802 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Have done!
Well ive tried to root again using ioroot 25 like i did initially but my phone doesnt like it at all
I get the little green android with the spinning thing on him but it doesnt go any further than that when i run the Windows Batch File - so going to do the whole process again - frustrating to say the least :/

wolverine73 said:
Have done!
Well ive tried to root again using ioroot 25 like i did initially but my phone doesnt like it at all
I get the little green android with the spinning thing on him but it doesnt go any further than that when i run the Windows Batch File - so going to do the whole process again - frustrating to say the least :/
Click to expand...
Click to collapse
If you've just flashed the KDZ, do a factory reset instead of just booting to android. (hold volume down + power until you see the lg logo, release for a moment and continue holding the 2 buttons untill the factory reset appears). If you're on the new base with knock on and the ioroot issues the reboot to recovery command it has the same effect, your data is cleared. You have to retry the rooting process (the second time it should work).

bender_007 said:
If you've just flashed the KDZ, do a factory reset instead of just booting to android. (hold volume down + power until you see the lg logo, release for a moment and continue holding the 2 buttons untill the factory reset appears). If you're on the new base with knock on and the ioroot issues the reboot to recovery command it has the same effect, your data is cleared. You have to retry the rooting process (the second time it should work).
Click to expand...
Click to collapse
I've finally sorted it out now - on the first flash of the kdz my phone pretty much remained the same, it bought it back to life and it wasnt reset at all and i couldnt root it.
On the second flash of the kdz my phone went through the whole set up process again (enter google account, language etc) and i managed to root easily after that.
It's put me off installing a custom recovery now though Ive expereince with the htc one x, dell streak, zte blade ...... all fine but with this im worried about getting a recovery installed incase i mess up again!
I know there is TWRP recovery and Philz recovery available but using flashify was what got me into this mess - do you suggest i use the usb cable and connect to my pc and install a recovery that way?
Side note - ive downloaded TWRP and Phils recoveries but none of them have a Windows Batch File to run hence me using Flashify - ive put the question on both of those threads aswell - where is the BAT command to run?
Thanks for your help

Use autorec m8. First root, second download autorec and click flash. Done
Sent from my LG-D802 using XDA Premium 4 mobile app

i turn on my LG Li-ion and it just keeps saying boot certification verify