error: Boot certification verify - G2 Q&A, Help & Troubleshooting

how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:

can anybody help me pls? nothing works for me :crying:

hansi25 said:
can anybody help me pls? nothing works for me :crying:
Click to expand...
Click to collapse
I have the same problem.

same problem
hansi25 said:
can anybody help me pls? nothing works for me :crying:
Click to expand...
Click to collapse
i am having the same to problem for a sprint optimus g however if plugged to laptop press volume up dwn and pwr at same time my phone goes into download mode but will not load drivers

HELP!!! - Bad TWRP Flash
Has anyone solved this?

I have the same issue
I ended up sending the phone to lg and they wanted 350.00!!!!! to fix it!!!! i told them to send my phone back. not idea what to do yet once i get it but hopefully someone will come up w a solution. i cant even get mine into download mode or recovery

hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
Here is the solution.
http://forum.xda-developers.com/showthread.php?t=2582142

Do you have an option that DOESNT require ubuntu to install it?

me to in the same boat, The thing is I have download mode but gets stuck at 49%, I need the TOT file for D802G Think this is EE / Three. does anyone know if kdz can be converted to TOT "worth a try"

same problem
i have the same problem ...did you find it?

Just did this to my phone just a few moments ago as well :/ anyone have any luck with windows?

giorgos13 said:
i have the same problem ...did you find it?
Click to expand...
Click to collapse
I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.

need help
jacobdavidson96 said:
I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.
Click to expand...
Click to collapse
my LG G2 F320L just got this issue.
what do you mean download the AutoRec app? its just stuck at LG logo then the error will show up. then just blank screen.
please help.

mm2_02 said:
my LG G2 F320L just got this issue.
what do you mean download the AutoRec app? its just stuck at LG logo then the error will show up. then just blank screen.
please help.
Click to expand...
Click to collapse
It's a bootloader issue, for me it was. If you can enter recovery, flash JB Bootloader or KK Bootloader, whatever your rom needs. it worked for me.

Autorec
hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
Hey man, if youre able to boot into your rom, try this,
AutoRec
http://forum.xda-developers.com/showthread.php?t=2715496
It sorts of reflashes your boot recovery to TWRP, works for me when i got the same error.

jacobdavidson96 said:
I don't know if you managed to find the solution to this, but for anyone else out there that hasn't, just download the AutoRec app. Fixes it in seconds and flashes TWRP Recovery.
Click to expand...
Click to collapse
Thanks for this. I just ended up back on a (brand new, mind you) G2. I've had SO many problems with rooting, recovery, download mode, etc... I have TWRP installed, stock ROM and somehow ended up getting the secure boot error only when entering download mode. My phone was booting, recovery was working, etc - just download mode seemed toasted. AutoRec fixed it - so, thanks for posting this!

I had the same issue, if some of you want to know how I fixed it these steps might help you too...
What you need is :
Any versoin of stock kdz. I used 11a. GET FROM HERE
LG Universal drivers. Get them here
If you have verizon get your driver here
KDZ Flash tool. GET IT HERE
1- Power off your phone completely ... remove battery etc...
2- Plug the UsB cable to your phone and your computer.
3- Hold down volume up and power button and enter in the download mode
4- If you in download mode you can now flash any KDZ file using the method in one of the guide above or find it using google.
after flashing you will have the stock rom installed. I was on 4.2 and for some reason i was not able to root with "ioroot" until i updated to 4.4!
so make sure you are on 4.4 to do the root
later you can install any recovery. I installed autorec.apk and then booted into recovery and flashed latest version of twrp
thats about it.... but don't install MIUI that rom is stupid

hansi25 said:
how in hell can i solve the problem "error: Boot certification verify"
i can not go into recovery, download or anything, i searched so much but i didnt find an answer for the lg g2. pls help me :crying:
Click to expand...
Click to collapse
have you try vol down + power button ( LG Logo ) then Hold Vol down + Power ? till you get to factory reset ! and power key again will take you back to recovery

WOW! Thank You soooooooooooooo much! I flashed a cloudyg3 backup from VK Rom and got this error but this method worked!

Just download AutoRec and choose to flash TWRP. Worked for me.

Related

[Q] Bricked phone. Can't access ADB, CWM

Hello!
Yesterday I tried flashing AOKP unofficial to my LG Optimus L5 E610, and something went wrong.
When I got the "Update finished" in CWM, I rebooted. I had a good welcome by a white screen, and some random things happening at the bottom of the screen. The phone shows the first LG Logo, but not the second one.
When I connect it to PC, or loader, It stops at just a blank, white screen.
I have tried using KDZ Updater, but it says "PHONE NOT FOUND". The same thing about ADB.
When I try to boot up in the CWM, All I get is a short flash from the key lights, and nothing happening from there.
I have tried entering emergancy, and download mode too, but I am not sure about the key combo for these modes.
Is there a way to get in another working ROM, or the stock one?
Please, help :'(
Edit: I managed to get in to the download mode, but KDZ updater ican still not find my phone when attempting to update
TechSaavy said:
Edit: I managed to get in to the download mode, but KDZ updater ican still not find my phone when attempting to update
Click to expand...
Click to collapse
You have to use a special kdz, v10d_download, search it on the net.
And are you waiting holding the buttons until the pone vibrate to enter cwm?
raul338 said:
You have to use a special kdz, v10d_download, search it on the net.
And are you waiting holding the buttons until the pone vibrate to enter cwm?
Click to expand...
Click to collapse
I have the .kdz with the stock firmware. I load it in to the KDZ Updater, and I get PHONE NOT FOUND every time
I have been holding the buttons for about 2-3 minutes, but nothing happend. Not even vibrations, or a single screen flash
TechSaavy said:
I have the .kdz with the stock firmware. I load it in to the KDZ Updater, and I get PHONE NOT FOUND every time
Click to expand...
Click to collapse
You have to flash v10d_downgrade FIRST, and then, when it finisihes, let it boot up (it'll be in russian) , then you can flash anything you want
raul338 said:
You have to flash v10d_downgrade FIRST, and then, when it finisihes, let it boot up (it'll be in russian) , then you can flash anything you want
Click to expand...
Click to collapse
I managed to get the phone in to the download mode, but it installet JB instead of ICS. Now, I am unable to root the device :'(
Where can I find the downgrade kdz?
Oh, I forgot to mention that after getting it running with JB,it does not want to enter download mode anymore. Ideas?
Ok, so I found the v10d_downgrade.kdz , flashed it, and it is stuck in a bootloop.
Tried flashing the original kdz, but it gives the same result.
TechSaavy said:
Ok, so I found the v10d_downgrade.kdz , flashed it, and it is stuck in a bootloop.
Tried flashing the original kdz, but it gives the same result.
Click to expand...
Click to collapse
Well thats wierd, whats the size of the file?
Code:
253 MB (265.392.128 bytes)
Thats the size of the file that i have. Maybe restart pc & phone and try again.
Actually there is no secure root option for JB (unless you want a chinesse root app)
what did you do to get into download mode
TechSaavy said:
I managed to get the phone in to the download mode, but it installet JB instead of ICS. Now, I am unable to root the device :'(
Where can I find the downgrade kdz?
Oh, I forgot to mention that after getting it running with JB,it does not want to enter download mode anymore. Ideas?
Click to expand...
Click to collapse
I'd flashed a wrong radio image and the cell now does'nt start just the flashing lights signal, what did you do to enter download mode?
Thanks in advance
Search Google for Hard-Reset followed by your device name. You will get a key combination to hard reset it.
Best of luck!!
Sent from my LG-P700 using xda app-developers app
Try the kdm updater of lg

[Q] [Q} Is my D802 Bricked?

Hi all
my D802 can't reboot with following method, could you please help me investigate how to fix it?
1. Can't enter download mode: I power it off, then hold volume up and plug in USB, but only the first screen shows up, can't enter the second one:
http://i.imgur.com/Kc4egAZ.jpg
http://i.imgur.com/jdCWBEW.jpg
So I can't flash kdz image.
2.I am able to access TWRP with official factory default( power+volume down to power on, when LG logo shows up, release power and volume down, then hold power.). But no matter I flash CloudyFlex which in my sdcard, or sideload flash others ROM, the cell phone will no boot up, always stuck at LG logo.
Any possible way to fix? Thank you very much.
helleon said:
Hi all
my D802 can't reboot with following method, could you please help me investigate how to fix it?
1. Can't enter download mode: I power it off, then hold volume up and plug in USB, but only the first screen shows up, can't enter the second one:
http://i.imgur.com/Kc4egAZ.jpg
http://i.imgur.com/jdCWBEW.jpg
So I can't flash kdz image.
2.I am able to access TWRP with official factory default( power+volume down to power on, when LG logo shows up, release power and volume down, then hold power.). But no matter I flash CloudyFlex which in my sdcard, or sideload flash others ROM, the cell phone will no boot up, always stuck at LG logo.
Any possible way to fix? Thank you very much.
Click to expand...
Click to collapse
What did you do prior to this happening? We need a story.
CuraeL said:
What did you do prior to this happening? We need a story.
Click to expand...
Click to collapse
not sure, I did few stupid things before.
1. I flashed LG G Pro 2 ROM here: http://forum.xda-developers.com/showthread.php?t=2673143 but it not good for me, so i went to recovery. but this rom replaced my recovery to a unknow one, not TWRP. when I was in this unknow recovery, my phone linked with PC via USB. PC found a lot of unformatted drivers, I did the most stupid thing: formatted one of them.
2. G Pro2 rom still can boot up, I flashed stock kdz, and rooted it with ioroot10, then flashed TWRP 2.6.3.3.
3. copy CloudyFlex_1.4.zip into sdcard through MTP mode of stock rom. reboot into recovery TWRP, flash cloudyflex, phone never boot up again.
4. No matter what rom i flash, always stuck at LG logo and the phone become hot.
sorry for my pool English.
helleon said:
not sure, I did few stupid things before.
1. I flashed LG G Pro 2 ROM here: http://forum.xda-developers.com/showthread.php?t=2673143 but it not good for me, so i went to recovery. but this rom replaced my recovery to a unknow one, not TWRP. when I was in this unknow recovery, my phone linked with PC via USB. PC found a lot of unformatted drivers, I did the most stupid thing: formatted one of them.
2. G Pro2 rom still can boot up, I flashed stock kdz, and rooted it with ioroot10, then flashed TWRP 2.6.3.3.
3. copy CloudyFlex_1.4.zip into sdcard through MTP mode of stock rom. reboot into recovery TWRP, flash cloudyflex, phone never boot up again.
4. No matter what rom i flash, always stuck at LG logo and the phone become hot.
sorry for my pool English.
Click to expand...
Click to collapse
Sorry man, I have no idea what you may have formatted then.. :/
I can't think of anything right now.. If you can't get to download mode and flash stock kdz again.. Then I don't know. I hope some one comes along that knows something. Sounds serious. I'll keep on thinking about things. But I have to leave the house now so..
Sorry.
CuraeL said:
Sorry man, I have no idea what you may have formatted then.. :/
I can't think of anything right now.. If you can't get to download mode and flash stock kdz again.. Then I don't know. I hope some one comes along that knows something. Sounds serious. I'll keep on thinking about things. But I have to leave the house now so..
Sorry.
Click to expand...
Click to collapse
thx mate. Just wondering why can't get to download mode. After formatted a driver, flash stock kdz successfully and the stock rom work pretty well.
did you fix the problem, i have almost the same issue, my phone gos into first download mode screen, but not the second one, so noway to flash a kdz, help us please.

[Q] Flashed wrong kernel!!!

i Was trying to get rid of the hissing noise on my
Lg g2 D802
i had TWRP installed
I read in a trhead that flashing the dorimanx kernel should fix that problem.
So i tried flash it, but instead of flashing the D802 i flashed the D800, i know i'm an idiot :/
I had a backup stock kernel but i think that's a wrong one too, again i'm an idiot
Now my phone boots into a black screen within the left top corner:
[2800] Fastboot mode started
[2850] udc_start()
i cannot boot into twrp anymore, it's basically bricked.
Can anyone help me recover my phone? i loved that thing, you will be my hero.
i promise when this is resolved i will never mess around with roms and kernels ever agian, i'm freaking out
henny420 said:
i Was trying to get rid of the hissing noise on my
Lg g2 D802
i had TWRP installed
I read in a trhead that flashing the dorimanx kernel should fix that problem.
So i tried flash it, but instead of flashing the D802 i flashed the D800, i know i'm an idiot :/
I had a backup stock kernel but i think that's a wrong one too, again i'm an idiot
Now my phone boots into a black screen within the left top corner:
[2800] Fastboot mode started
[2850] udc_start()
i cannot boot into twrp anymore, it's basically bricked.
Can anyone help me recover my phone? i loved that thing, you will be my hero.
i promise when this is resolved i will never mess around with roms and kernels ever agian, i'm freaking out
Click to expand...
Click to collapse
Try to flash back to stock with kdz, as far as I am hearing this you kinda soft bricked it but not hard so it's still recoverable, you could also maybe try to flash your recovery back with fastboot since your in fastboot mode but I never tried that so I suggest you to go back to stock with kdz flashing
ye try enter download mode and follow this (use search) i think its volum up and connect usb to pc
http://forum.xda-developers.com/showthread.php?t=2432476
wulsic said:
Try to flash back to stock with kdz, as far as I am hearing this you kinda soft bricked it but not hard so it's still recoverable, you could also maybe try to flash your recovery back with fastboot since your in fastboot mode but I never tried that so I suggest you to go back to stock with kdz flashing
Click to expand...
Click to collapse
thank you for your response, but i am kind of noob and have no idea how to do that correctly, could you link something or explain it?
henny420 said:
thank you for your response, but i am kind of noob and have no idea how to do that correctly, could you link something or explain it?
Click to expand...
Click to collapse
Try the link above mentioned by Overclocked
OverClockeD_GR said:
ye try enter download mode and follow this (use search) i think its volum up and connect usb to pc
http://forum.xda-developers.com/showthread.php?t=2432476
Click to expand...
Click to collapse
Thank you for your reply, i tried to get into download mode, but failed every time, i can only press the power button for 5 sec and the Lg logo apears, then i get the same screen.
did this way?
Your phone must be turned off before starting the steps from this guide.
So, press power button and select “power off”.
Then, press the volume up button on your LG G2.
While you are holding the volume up button, plug in your phone’s USB cable.
Keep pressing the Volume up button until the download mode is being displayed.
Now the phone will install some drivers – it should take around 10 minutes to complete; the best will be to let your device install the mentioned drivers.
OverClockeD_GR said:
did this way?
Your phone must be turned off before starting the steps from this guide.
So, press power button and select “power off”.
Then, press the volume up button on your LG G2.
While you are holding the volume up button, plug in your phone’s USB cable.
Keep pressing the Volume up button until the download mode is being displayed.
Now the phone will install some drivers – it should take around 10 minutes to complete; the best will be to let your device install the mentioned drivers.
Click to expand...
Click to collapse
the problem is, i can't turn it off (very weird) it instantly gives me the logo for 1sec and turns back to the same screen.
you can also try this.
http://forum.xda-developers.com/showthread.php?t=2477595
just use search mate like i do now... its soft brick i think relax and you will find it many had same prob before
henny420 said:
i Was trying to get rid of the hissing noise on my
Lg g2 D802
i had TWRP installed
I read in a trhead that flashing the dorimanx kernel should fix that problem.
So i tried flash it, but instead of flashing the D802 i flashed the D800, i know i'm an idiot :/
I had a backup stock kernel but i think that's a wrong one too, again i'm an idiot
Now my phone boots into a black screen within the left top corner:
[2800] Fastboot mode started
[2850] udc_start()
i cannot boot into twrp anymore, it's basically bricked.
Can anyone help me recover my phone? i loved that thing, you will be my hero.
i promise when this is resolved i will never mess around with roms and kernels ever agian, i'm freaking out
Click to expand...
Click to collapse
I did the same thing today by accident. I still can boot into recovery tho, TWRP. Copied the correct kernel file via OTG but it just reboots the recovery and doesn't install the kernel. Have you find any solutions?
EDIT: I actually managed to flash the right kernel and the problem is now fixed. Check everything before flashing something guys, caution

Phone doesnt boot into recovery mode bt restarts normally

wanted to root the device so i kept my phone on fast boot and unlocked bootloader then i tried to flash TWRP recovery, everything seem to be okay till now, bt when i unplugged my phone and tried to go into recovery by pressing unlock+volumeup+volume down, it shows the YU logo then the screen blinks and again it shows YU logo, and nothing happens, bt when i try to rebot the phone, it works normally. I dont know what kind of problem i am facing please help me, unable to go to recovery mode :crying:
I am having the same issue
Hatzzz said:
wanted to root the device so i kept my phone on fast boot and unlocked bootloader then i tried to flash TWRP recovery, everything seem to be okay till now, bt when i unplugged my phone and tried to go into recovery by pressing unlock+volumeup+volume down, it shows the YU logo then the screen blinks and again it shows YU logo, and nothing happens, bt when i try to rebot the phone, it works normally. I dont know what kind of problem i am facing please help me, unable to go to recovery mode :crying:
Click to expand...
Click to collapse
Dude I did the same things as you and even my recovery is not working i tried searching everywhere but i didnt find any fix, Can anyone plz help us :crying:
double0seven37 said:
Dude I did the same things as you and even my recovery is not working i tried searching everywhere but i didnt find any fix, Can anyone plz help us :crying:
Click to expand...
Click to collapse
Sorry for the late reply, I am new to xda forum. I faced the same issue when I switched from cwm to twrp. You can try flashing cwm recovery with the help of rashr or flashify app. Both are free apps and are available on play store. You can google how to use these apps. There are many sites and blogs explaining the steps. You can also use all-in-one tool for yureka to flash cwm/twrp. You can find this tool on xda forum with detailed help.
Good luck.
Yes use flashify app to flash twrp recovery if you have root access. I used this method and I am able to boot into recovery.
See guyzzzz..if u can reboot ur phone ....u first go to settings>developer options>advanced reboot...make it on ..then just click the powe button (as for restart or shut down) u just click on reboot....as u reboot u get 4 options .....in that u get recovery....just click that u will be in recovery....if u can't msg agaim...

Please Help My Phone Bricked, showing white lines Due to Autorec

Hey Guys could someone please help me my phone is bricked i was trying to install a custom recovery through autorec hence when i pressed the reboot to recovery option my phone hanged and gone dead i cant see anything in my screen without that freaky whilte lines at the corner of screen i tried everything which i know could please someone here helps me that how i come out of this problem. Real Help will be appreciated. please am waiting for your replies.. i am using LG G2 LS980
please help me my phone is bricked i was trying to install a custom recovery through autorec hence when i pressed the reboot to recovery option my phone hanged and gone dead i cant see anything in my screen without that freaky whilte lines at the corner of screen i tried everything which i know could please someone here helps me that how i come out of this problem. Real Help will be appreciated. please am waiting for your replies.. i am using LG G2 LS980
luckyali4it said:
please help me my phone is bricked i was trying to install a custom recovery through autorec hence when i pressed the reboot to recovery option my phone hanged and gone dead i cant see anything in my screen without that freaky whilte lines at the corner of screen i tried everything which i know could please someone here helps me that how i come out of this problem. Real Help will be appreciated. please am waiting for your replies.. i am using LG G2 LS980
Click to expand...
Click to collapse
Does the download mode still work?
(turn off the smartphone, hold Vol. Up and plug in the usb cable Form PC)
If so, then simply flash the Stock-ROM with the LG-Servicetool.
I think your Downloadmode is bricked too. Right?
does the smartphone start in android and do you have root?
if so, you have to extract the laf.img from your firmware and install it via flash app as recovery.
Your Firmware?:
https://lg-firmwares.com/de/lg-ls980z-firmwares/
KDZ Extractor (WindowsLGFirmwareextract...):
https://forum.xda-developers.com/showthread.php?t=2600575
Watch this Video:
https://m.youtube.com/watch?v=M4s6wrpD2Gk
-> Rename the extracted laf12345.bin to laf.img !
Than the download mode should work again and you can reinstall your Stock-Rom with the LG servicetool and all work fine again.

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