[Q] Bricked Phone, need help - G2 Q&A, Help & Troubleshooting

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

Related

lg nexus 4 stuck on nexus logo after factory reset

Hi guys. My nexus 4 is rooted. Everything was perfect. I just wanted to do a fresh start. I did factory reset. Then it rebooted. Came to language selection. I selected English and than suddenly screen was black and nothing happened. I restarted again and it stuck on nexus logo. I did downloaded root toolkit 1.63 and it found my model and its selected 4.2.2 automatically. Then it downloaded stock image file and said my device adb error saying need to select USB debugging mode. I can't cause its stuck. Now about the rom it was liquidsmooth rom. Please help me how to go back to stock android 4.2.2. Thanks.
hi,
did u try to wipe cache/dalvik?
Bro I do not know what happened but I did volume up and power for 20 secs and power button again. It showed boot loader mood and switched off the device.
fahad2mail said:
Bro I do not know what happened but I did volume up and power for 20 secs and power button again. It showed boot loader mood and switched off the device.
Click to expand...
Click to collapse
sorry, but for the stock img flash isn't needed just the bootloader mod? The deb mod is useless for this!
Throw it in the trash.
dont use a toolkit, they can create more issues than they are worth. boot into the bootloader, then flash the stock image via fastboot. thats all.
Thanks a lot. I sold it. My bad. Dn wanna use custom rom again.
Sent from my GT-N7100 using xda app-developers app
fahad2mail said:
Thanks a lot. I sold it. My bad. Dn wanna use custom rom again.
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
Or read up so the next time you won`t get into trouble or at least know how to solve it if you do

[Q] HELP!! 4.4 update

i tried to update to 4.4 through factory image files and i wounded up getting stuck on the nexus symbol and it wont boot up!!
i tried then going to recover mode but its not even doing that! the furthest i can get is into fastboot mode and when i go to recovery mode theres just the red triangle with no menu at all.. just the picture with the red triangle.. all i can do from there is hard reboot
so the situation is..boot stuck and no recovery
thanks for the help!
Well you should be fine. The little red triangle is normal, it is the screen you get before it goes to stock recovery. If you were to google that, you'd see you need to depress the power button and the volume up buttons at the same time. You keep them pressed together for about 4-5 seconds before it goes into recovery. Once you do that do a factory reset and see if that works.
BTW when you post like this make sure you include a little more detail how you got to where you are. Like what operating system you are using, Windows _, Ubuntu __._, or IOS. Also if you were using a tool kit. If you have ADB and Fastboot installed, etc., helps w/ the diagnosis if you know what I mean.
jawmail said:
Well you should be fine. The little red triangle is normal, it is the screen you get before it goes to stock recovery. If you were to google that, you'd see you need to depress the power button and the volume up buttons at the same time. You keep them pressed together for about 4-5 seconds before it goes into recovery. Once you do that do a factory reset and see if that works.
BTW when you post like this make sure you include a little more detail how you got to where you are. Like what operating system you are using, Windows _, Ubuntu __._, or IOS. Also if you were using a tool kit. If you have ADB and Fastboot installed, etc., helps w/ the diagnosis if you know what I mean.
Click to expand...
Click to collapse
i know what stock recovery mode is and how to get to it.. its just that it doesnt show up .. just the picture with no options
anyways.. i figured out how to flash stock recovery from fastboot mode but every stock i try to flash i keep getting a bootloop!
namnam123 said:
i know what stock recovery mode is and how to get to it.. its just that it doesnt show up .. just the picture with no options
anyways.. i figured out how to flash stock recovery from fastboot mode but every stock i try to flash i keep getting a bootloop!
Click to expand...
Click to collapse
Maybe your factory image is corrupted. I downloaded the factory image from Google, checked the MD5 to make sure it was right, and then flashed it with no problem.
wipe data / factory reset on STOCK recovery.
https://www.youtube.com/watch?v=kFqZ7z4ZeLY&feature=youtube_gdata_player
Sent from my Nexus 4 using xda app-developers app
i had the same problem.. n then i found the solution by flashing it through toolkit follow here i made a video
http://forum.xda-developers.com/showthread.php?t=2531374
Sent from my Nexus 4 using xda app-developers app
Locking and then unlocking the boot loader has worked for several including myself
Sent from my Nexus 4 using XDA Premium 4 mobile app

[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.

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

[Q] LG G2 D802 Bricked..help me please

Hi!
I managed to get my device totally bricked.
Phone is on bootloop and I only get LG logo and then "Security Error" message. I can't enter recovery mode or download mode. Only mode I'm able to go is the "Hardware key control mode" mode, where I can see my IMEI code. I can't get windows or linux to recognize my phone. I've tried several drivers, but no luck getting my laptop recognize my phone. I have also tried couple of tutorials to solve this problem, but the main problem seems to be that I can't get my laptop to recognize my phone.
Is there anything I could do or should I just buy a new phone?
Hi Jutei,
What led to this bricking? Were you trying to install a ROM? Which ROM was it? Was it a wrong variant? Please be specific as to what you did to brick it..
Also, some people have seen success by installing this driver. Are you familiar with ADB?
y
Hi deathbytalkshow!
I ended up to this stage by rooting with this (http://forum.xda-developers.com/showthread.php?t=2448887) and trying to flash with this (http://forum.xda-developers.com/lg-g2/development-d802/rom-xenonhd-d802-t3036576).
First I wiped data and cache. Then rooted and it went trough with no problems. I tried to flash with this https://play.google.com/store/apps/details?id=com.koushikdutta.rommanager. It booted to recovery and started flashing. Soon it said that flashing failed and after reboot I found myself in this bootloop.
Hope this helps someone to help me.
Try this:
1. Turn phone off.
2. Press POWER+VOL DOWN
3. When LG Logo appears, immediately release POWER+VOL and press and hold VOL UP+VOL DOWN
4r44444 said:
Try this:
1. Turn phone off.
2. Press POWER+VOL DOWN
3. When LG Logo appears, immediately release POWER+VOL and press and hold VOL UP+VOL DOWN
Click to expand...
Click to collapse
Hi, I tried this and got to the factory reset window. It started to do reset, but pretty soon it booted and went back to bootloop. So this didn't help. I'll try those ADB drivers today.
Hi, tried adb drivers, but no luck. My laptop still doesn't recognize my phone. USB gives power, but beside that windows doesn't seems to notice that my device is plugged. Is there anything else I could try?
so you didnt make a backup before flashing? what recovery did you flash? i bricked my phone with rom manager before and will never use it again but i had a backup and was still able to get it to eventually boot into twrp to restore.
Sent from my LG-VS980 using XDA Free mobile app
---------- Post added at 10:38 AM ---------- Previous post was at 10:36 AM ----------
also if you never turned on usb debugging i dont think you can get a computer to see it unless its fully booted.
Sent from my LG-VS980 using XDA Free mobile app
jfletch86 said:
so you didnt make a backup before flashing? what recovery did you flash? i bricked my phone with rom manager before and will never use it again but i had a backup and was still able to get it to eventually boot into twrp to restore.
Click to expand...
Click to collapse
Yeah, I was stupid enough not to backup. The recovery was the stock one. Is that where I went wrong? Should I've had custom recovery installed?
jfletch86 said:
also if you never turned on usb debugging i dont think you can get a computer to see it unless its fully booted.
Click to expand...
Click to collapse
I turned usb-debugging was on before phone got bricked. I think the phone should be found somehow on computer. For example this fix (http://forum.xda-developers.com/showthread.php?p=48765620#post48765620) needs Linux to recognize the phone, but I can't even do that. I guess the problem here is that my phone won't enter the download mode. I'm going to try with couple of different computers when I get back home from my holidays.
I also found another fix to try. I have to drain the battery and after a little re-charge I should be able to enter the download mode. I'm trying this next.
yes thats where you made your mistake. that also makes me think download mode wont work period, but im not positive. im surprised rom manager even tried to flash anything without a recovery. thats why i dont use apps like that anymore because you wouldnt of been able to **** it up that bad on your own. so you said you tried the key combo to take you to the factory restore? if you didnt flash a recovery then i would think you could get that to work. did you look into lg's flash tool? maybe that will somehow read it. i remember seeing a post in the general forum about a way to take the phone apart and short the chip out but ive never had to actually read it so i couldnt tell you whats all involved. sorry bout your phone.
Sent from my LG-VS980 using XDA Free mobile app
---------- Post added at 11:53 AM ---------- Previous post was at 11:49 AM ----------
i forgot to read your link, just now did, why do you say you cant do that?
Sent from my LG-VS980 using XDA Free mobile app
Well, I just got myself in the same boat.
The phone will show the LG Logo then the security error and shut down. When plugged in with a USB to the PC it will just reboot.
Nothing is showing in Device Manager either. I done the same in the stock recovery and I tried to Side load CM12 it failed and straight into this loop.
I got nothing now. I just done see how shorting circuits will fix the issue when it's just software. Absolute nightmare as the 12 months warranty has gone.
I tried to do a hard reset and I get the android man saying its working then it shuts down and starts the error again. I'm unable to get in the Download Mode either and I'm stuck
I don't know what to do now. The flash and Support tool will not recognize the phone.
jfletch86, I tried LG Flash Tool, but the problem is that it just says no devices found. Same problem with fix I linked, I can't do anything to my phone if my laptop doesn't find it. I'm beginnig to loose hope
DvineDNO said:
Well, I just got myself in the same boat.
The phone will show the LG Logo then the security error and shut down. When plugged in with a USB to the PC it will just reboot.
Nothing is showing in Device Manager either. I done the same in the stock recovery and I tried to Side load CM12 it failed and straight into this loop.
I got nothing now. I just done see how shorting circuits will fix the issue when it's just software. Absolute nightmare as the 12 months warranty has gone.
I tried to do a hard reset and I get the android man saying its working then it shuts down and starts the error again. I'm unable to get in the Download Mode either and I'm stuck
I don't know what to do now. The flash and Support tool will not recognize the phone.
Click to expand...
Click to collapse
Oh man, I'm sorry to hear that you are in the same boat. Symptoms are the same. It seems that we have bricked our phones pretty badly. Hopefully someone comes up with fix that works. Problem is that anyone wise enough to fix this isn't stupid enough to end up this stage.
I'm hoping the same too. I just don't know why it wont allow me to do anything.
I have a nexus 4 and I've never had a problem.
I am getting nothing when plugged into my PC and its like the phone is turning on and off in the boot loop and the lg symbol.
I get the hard reset menu but the computer still doesn't recognise.
I just feel sick at the moment !!
jutei said:
jfletch86, I tried LG Flash Tool, but the problem is that it just says no devices found. Same problem with fix I linked, I can't do anything to my phone if my laptop doesn't find it. I'm beginnig to loose hope
Click to expand...
Click to collapse
are u saying you tried the ubuntu/linux fix? if that doesnt work then nothing will.
Sent from my LG-VS980 using XDA Free mobile app
Well, I just got myself in the same boat.
The phone will show the LG Logo then the security error and shut down. When plugged in with a USB to the PC it will just reboot.
Nothing is showing in Device Manager either. I done the same in the stock recovery and I tried to Side load CM12 it failed and straight into this loop.
I got nothing now. I just done see how shorting circuits will fix the issue when it's just software. Absolute nightmare as the 12 months warranty has gone.
I tried to do a hard reset and I get the android man saying its working then it shuts down and starts the error again. I'm unable to get in the Download Mode either and I'm stuck
I don't know what to do now. The flash and Support tool will not recognize the phone.
Click to expand...
Click to collapse
what were you doing, what steps did you do up until this?
got similar problem, g2 stuck on boot loop (going from custom rom back to stock) can enter download mode, cant enter recovery. help needed
ok, after 2 days of ****ing with boot loop... its gone, if u r on d802 eu open and got some questions... mabye i can help
my lg g2 is also stuck in bootloop and flashing rom wont fix it. the only improvement it have shown is android doodle and back to logo screen. please help me out.
taimurarbab said:
my lg g2 is also stuck in bootloop and flashing rom wont fix it. the only improvement it have shown is android doodle and back to logo screen. please help me out.
Click to expand...
Click to collapse
are you using the right bootloader for the rom you are flashing?
Sent from my LG-VS980 using XDA Free mobile app
jfletch86 said:
are you using the right bootloader for the rom you are flashing?
Sent from my LG-VS980 using XDA Free mobile app
Click to expand...
Click to collapse
i have no idea. please guide me through it.

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