Strangely bricked D802 - G2 Q&A, Help & Troubleshooting

So, I did brick my D802 in some way.
After a long history from cloudy g2-g3, rr, cm12, cm13, lineage 14.1, I clicked by mistake on the OTA of the lineage.
I thought I could stop the update once in the recovery, but I got stucked in the recovery bootloop. I got rid of it via recovery terminal, but system didn't boot. I tried reflashing lineage, nothing happened, I tried restoring a cm13 full backup, nothing happened, so I got back in download mode to restock with lollipop kdz (the one I used every time I restocked to change rom). It did not work, and I had to download a different KDZ to get to stock again.
Now, all the methods always used to root + recovery didn't work, so I manually rooted, installed the proper AUTOREC, but it didn't work (as I understand after hours of searching because supersu had updated himself in the meantime).
So I tried to install the TWRP image using flashify, it didn't work and corrupted something in my recovery. So i tried to unroot everything and reinstall the original root + supersu without letting him autoupdate. Not working.
Well, now I can boot and I can get in original lollipop rom, but I have no recovery and download mode appears but doesn't work anymore (once I had 3 COM ports when connected in download mode, now I can see only one; kdz flash does not sense the phone connected). When I try to open recovery I got the error "boot certification verify, secureboot error" in the top left corner of the screen, then a white page opens with the message "critical error" "demigod crash handler", volume up to download mode (that opens but does not work), volume down to reboot.
Now, I am stucked, I cannot find any suggestion of what to do to get the recovery working or to get the download mode working again.
Any help will be highly appreciated.
Thank you very much guys.

Not sure will it help but you may give it a try:
https://forum.xda-developers.com/lg-g2/development/tools-srk-tool-useful-toos-lg-root-twrp-t3079076

Related

Security error after recovery update

I have a d802 . I had cloudy1.3 and twrp 2.7 installed with autorec. I tried to update it using
dd if=/sdcard/recoveryfilename.img of=/dev/block/platform/msm_sdcc.1/by-name/recovery
(from twrp page, with the latest img file).
But I coudn't access recovery, some error about security. Then I shutdown my phone and then it booted fine into system. I retried to access recovery but nothing.
So I decided to return to autorec, I installed it, I clicked "Flash Recovery" and now my phone doesn't boot in any way.
It show "lg security error" and then shutdown.
I can access download mode. Is there a way to fix my phone without deleting everything?
I'm sure the problem is the recovery, I was messing with it, can I bring my phone back and don't delete my configuration, photos, apps?
Thanks
I'm so happy!
I did it!!!
I managed to boot into recovery with the usual combination of keys (with the method that ask you if you want to format, but then you press power and it boot into recovery).
From there I saved everything using adb pull (Just in case). Then I dirty flashed Cloudy 1.3 and my phone is back !
I hope my experience can help someone

LS980 black screen (bricked?) unsure how to get back.

So I was relatively ok playing with my lg g2, rooted and have twrp 2.8.6.1 installed. It has been couple of months since I can't connect to freedompop/sprint network -- I can't change the cdma setting from nv to ruim/sim, I am thinking that it was the cause. Then I decided to upgrade twrp to 3.0.2, I boot into twrp, flash img, recovery, then I can't boot back to recovery. Something with fastboot. Surprisingly, I still can boot to system. Check root access, still have it. Then I used flashify to flash twrp back to 2.8.7 but to no avail, still the same thing, no recovery but boot into the system. Then I use autorec for ls980 on androidfilehost by bender_07, that's when things went down. Screen just black, not even lg flash screen, nor download mode, nor recovery. When I plugged the phone to computer, it asks to format multiple drives (15 or so), I am not sure where to go now. Anyone have any ideas?
-Found a solution, managed to get download mode working and tot-ing back

HELP ASAP I was installing my custom recovery and my phone entered a bootloop.

So I was installing twrp and everything went right until it didnt boot to the recovery and from then it keeps booting to lg logo and bootloader warning forever.
I know I can install the stock rom with lg up by I cannot enter download mode since the phone isnt technically turned off. Does anyoene have a solution.
It's my main phone and I literally cannot afford a phone right now.
A way to turn it off would be the solution. Battery was around 70% so it will take a long time to actually have 0%.
Update: I got to the fasboot menu from where I can run fastboot reboot recovery after installing twrp again. Now I have some mounting issues and I cannot flash any zip without entering bootloop. Im trying to use the shut down menu of twrp to try to enter download mode.
2nd Update: solved using lg up with the latest android version.

Bootloop after updating magisk

I have an asus zenfone 2 laser running android lollipop. I have turned the USB debugging on for my laptop.
I used to install kingoroot for rooting my phone, and it works fine.
For no particular reasons, i switched over to magisk and uninstalled the kingoroot apps.
The installation was successful, then the app asked me to update it via the app. I updated it, and then it asked me to do reboot.
I rebooted............and i got stuck in bootloop.
I got into the recovery mode and factory resetted the phone but i am still stuck with the bootloop.
I tried to install magisk uninstaller zip from sd card but the installation was unsuccessful
I tried to install the latest firmware from ASUS's official website from SD card and was unsuccessful
I tried to flash the latest TWRP to my device via flashboot. Since many tutorials out there have a TWRP Recovery mode to fix the problem which i don't hace at the time. i used "fastboot flash recovery TWRP.img" command and it said finish.
But it lead me to a new problem. I cannot use "power button+vol.down" key combination to access stock recovery mode. And the TWRP recovery mode doesn't come out as well.
One thing that i can use is the "power button+vol.up" key to access fastboot mode..
I stopped messing around with my devices for now so that i don't make the problems worse. I hope someone can help me out with this problem
BIG THANKS

-PLEASE HELP- UNABLE TO FLASH TWRP OR ROOT

Hello
Sorry for my bad english
a few months ago, i decided to flash my first custom rom (One UI rom) and it worked fine
then i was testing a lot of other roms too until i tried lineage os 20
when i flashed lineage os 20, i decided to try another rom but i was stuck on the twrp logo screen. i tried methods of fixing it but none of them worked.
after trying a method of flashing twrp once again, it failed and i got stuck in a reboot loop and could only boot into download mode. so i booted into download mode and flashed a stock rom.
everything was working fine again until i wanted to try another custom rom. At first whenever i would flash twrp, they would always fail. but later i found the cause of that and fixed it. then, flashing twrp would always pass but my device would get stuck on a reboot loop once again and i had to flash stock rom again.
i tried rooting using auto root but it would show me a verification failed error and i had to reset my device. so now im stuck on a device which cannot flash twrp, nor can it be rooted. its been 1 month and i could not find a viable solution so any help would be extremely appreciated.
You have to just reflash your fastboot rom with fastboot mode unzip it and double click on flash_all.bat file or something like that
it is a samsung, there is no fastboot mode

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