Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
bobiak said:
Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
Click to expand...
Click to collapse
Did you try to unlock the bootloader again - after you unbricked it?
If so, did it work?
@bobiak
Congratulation to your result! Most of the guys i know, would have a unusable paperweight after those experiments.
non-toxic said:
@bobiak
Congratulation to your result! Most of the guys i know, would have a unusable paperweight after those experiments.
Click to expand...
Click to collapse
Thanks
ofirfed said:
Did you try to unlock the bootloader again - after you unbricked it?
If so, did it work?
Click to expand...
Click to collapse
When trying to solve the recovery loop (the link attached) you are moving some system files where bootloader is, so after flashing with KDZ I had bootloader locked againg, but when I got in that recovery loop again and didn't mess with moving any system files, after flashing KDZ my bootloader was still unlocked.
I didn't flash my unlock.bin to see if really bootloader is unlocked, recovery and root flashed without problem.
same problem
bobiak said:
Hello, today I started to having some more fun with my LG G5, I unlocked bootloader, flashed TWRP and installed SuperSU, then I started to flash firmwares. I flashed "Tizen" rom for G5, flashed nicely, everything was working and I had one more software to flash on my sd "Genisys" which I wanted to try. After flashing I was stuck on lg logo, went again to recovery, and formatted system, then again flashed this soft and after rebooting I was stuck in a recovery loop.
From here: https://forum.xda-developers.com/lg-g5/help/bootloop-twrp-t3514927 I tried the solution and my phone is showing now red triangle with "Your device is corrupt. It cannot be trusted and will not boot.
I can still get to bootloader but when i try to flash my unlock.bin again there is a "Bootloader Unlock key write fail" message.
Any help appreciated
Solved: Download mode worked so I installed V20a KDZ with LGUP.
Click to expand...
Click to collapse
how to fix? same here
After a few phones with flashing roms..ive come to the realization that its a waste of time..stay stock
Martin_ger said:
how to fix? same here
Click to expand...
Click to collapse
Read the last line.
Related
Today had unlocked bootloader, made everything and ended up in V20F with official unlocked bootloader, but, for noob's reazons I can't flash cwm. flashed V20D for root and install recovery for locked bootloader, and there, flashed cwm.zip (http://forum.xda-developers.com/showpost.php?p=44300426&postcount=358) installed succefully, reboot and then it gave me security error. Got into S/W And realized that it wasn't unlocked.
After some researching, found that the unic way to save my phone was by official LgMobile Support, it didn't recoignaized my phone.
Dindn't gave up and tried crazy things, flashed cwm in unofficial fastboot, then p760 JB uboot and x-boot(Lelus fastboot http://forum.xda-developers.com/showthread.php?t=2292828), then I reboot into CWM touch without problem! Thought about getting
unlocked bootloader and flashed CM10.1 Unofficial, and it flashed , reboot and had LG bootscreen inverted, but everything else okay, so I don't know
if this can help to anybody, maybe can be a new method to unlock without making crazy things.
By the way, as you can notice English is not my native languaje, so sorry if I made mistakes.
you forgot this one
http://forum.xda-developers.com/showpost.php?p=44161955&postcount=310
this will fix the inverted lg logo at boot, flash in cwm
all you needed was to flash the u-boot.img for 20f in fastboot, you would have had no security error.
I tried to root my mom's LG p769 I tried installing cwm recovery with flashify with out unlocking the bootloader. I know I'm an idiot! I never had this problem before, if possible can I get the phone working without a hardreset? I neeeeed help
I have a similar problem on my p760. I followed this guide.
I got my phone succesfully updated to version V20H. Then in this post I followed the link for locked bootloader, but it re-linked me to a UNlocked bootloader guide. Now when I try to turn on the phone it says "SECURITY ERROR". I tried redo the update V20H but i got stuck at 4%. I can't go on hard reset mode. I used several guides, but they didn't work for me. Any help is appreciated. Sorry for my bad english :silly:
EDIT:
Nevermind. I went to sleep and this morning I tried this in normal flash and it worked.
Go to download mode and flash correct kdz by offline method or by official lg recovery (flash firmware which you had before unlocking). Everything should be okey
I came from cm13 and i suddenly think of returning back to stock lollipop. After a few days, I realize cm13 is a lot better. I downgraded back to kitkat and unlocked the bootloader the way I did before. Before, it was successful. But now, when I flash TWRP and reboot to recovery using flashify, it shows security boot error. I upgraded to stock lollipop and tried it unlocking bootloader there. I flashed TWRP but when I entered TWRP, I cannot reboot back to system. I cannot get out of recovery!! Pleasee help... I want to get cm13 back
ShadowBlade_20 said:
I came from cm13 and i suddenly think of returning back to stock lollipop. After a few days, I realize cm13 is a lot better. I downgraded back to kitkat and unlocked the bootloader the way I did before. Before, it was successful. But now, when I flash TWRP and reboot to recovery using flashify, it shows security boot error. I upgraded to stock lollipop and tried it unlocking bootloader there. I flashed TWRP but when I entered TWRP, I cannot reboot back to system. I cannot get out of recovery!! Pleasee help... I want to get cm13 back
Click to expand...
Click to collapse
actually i gave a answer for you http://forum.xda-developers.com/showpost.php?p=64674426&postcount=2
u even can flash kdz ? if yes, try it and check if your bootloader unclocking method, file, is correct.
You could brick your phone.
Hi,
I have a rooted LG G5 H850 with an unlocked bootloader and TWRP. I was on H850 20A OPEN EU ROM from autoprime and I tried to flash H850 20D OPEN EU ROM. I booted into recovery TWRP and flashed the Zip file together with the newest SuperSU. When I tried to reboot the phone stuck in reboot - always changing between the message "Your device software cannot be checked for corruption" and the LG logo. After a long time (15 minutes or so) I pulled the battery. The same thing. Then I tried to get into recovery using the 2 hands method. I clicked through the factory reset screens (yes, yes...) - and the phone stuck between warning screen and logo again.
Could someone help me to get into TWRP again? If this would be possible I could restore my backup. Otherwise I don't what to to else...
Thanks for any helP!
Ok, after several tries with the 2 hand method, I got into TWRP again. I tried to restore my backup but it failed with an error. After that I did a full wipe (factory reset) but without the internal storage. Then I flashed the 20D zip again, after that SuperSU. Now the phone is rebooting and rebooting and rebooting. It is stuck on the LG logo and nothing else is happening. It's frustrating...
Firmware reset > flash zip file.
If that doesn't work use the LGUP or LG Bridge method to flash firmware. There should be threads in the development section
projectsome said:
Firmware reset > flash zip file.
If that doesn't work use the LGUP or LG Bridge method to flash firmware. There should be threads in the development section
Click to expand...
Click to collapse
Thanks for your help, but I don't use windows. But in the meantime I got it solved. The reason for the failure was a corrupted external sd card. Flashing from a new card did help.
i'm getting the same problem with the OREO OPEN EU ROM, booted into TWRP, flashed SuperSU and after a few loops got stuck on the LG logo. Had to pull the battery, go into download mode & reflash the ROM via LGUP. I somehow doubt it's the SD card as there were no errors on the SuperSU install.
I really don't know what is left to do, I always end up with a bootloop and have to repair my phone with flashtool. I have tried flashing twrp by adb/fastboot, temporarily booting to twrp, flashing different twrp files after repair.... I always get boot loop. Help please :/
Once I had my phone rooted by oneclickroot support, then I started to get play store crashed constantly. Once I booted to recovery and when try to reboot, got a bootloop. I tried to flash a new rom, so found a stock rom for Z5C and flashed it by twrp. But after a reboot I lost the twrp recovery this time. Then I tried to flash the recovery myself using abd, following the basics; fastboot flash boot boot.img/recovery recovery.img But I again stuck into a bootloop. Repaired again... I thought flashing a custom recovery breaks the phone, so I decided to just boot the recovery and install supersu. but again a bootloop in the end.
Is your bootloader already unlocked?
Gewiz said:
Is your bootloader already unlocked?
Click to expand...
Click to collapse
yes sir, already.
flash complete stock, no modifications.
confirm if it loads to usermode
NeoBeum said:
flash complete stock, no modifications.
confirm if it loads to usermode
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Click to collapse
I have flashed the lastest stock ftf by flashtool, that is what I do after everytime I brick it while trying to obtain root. And if you mean switching to another user, yes it does.
that's good. it means hardware is fine.
it's your root method.
try this
https://forum.xda-developers.com/showthread.php?t=3609358