HELP! Phone stuck at boot screen. I need help ASAP

[beannshie]

I tried to root my phone for the first time.
I booted into TWRP and installed SuperSU and TWRP, then my phone rebooted.
When I try to reboot it or turn it off it does the following :
it starts booting up, then after a second it reboots again, then flashes the boot screen and repeats this a couple times until it gets stuck on the boot screen.

My phone is a LG G6 (h870) ThinQ.
Android version 8.0.0.

Everything I did prior to this :
unlocked my bootloader and that reset my phone,
after that I accidentaly wiped it again using the hard reset option (while booting holding the power button and volume down button),
then i booted into TWRP again and installed SuperSU.

This is what I followed after unlocking my bootloader : https://www.androidblog.gs/how-to-root-lg-g6-and-install-twrp-recovery-on-it/

 

[ocnbrze]

so can you still get into twrp? if so you might be able to just flash a custom rom.

here is as close to stock rom that i could find that is still custom made:
https://forum.xda-developers.com/lg-g6/development/rom-eu-lg-h870-10l-rom-t3633452

 

[Hadron]

A shame you didn't use TWRP to take a backup before flashing the superuser package. It's a good rule to always take a nandroid (recovery backup) before making any modification to the system, precisely in case something like this happens.

Here and now you could try another factory reset, but I think that's very unlikely to help. So you need to flash a new ROM, either stock or custom.

 

[Dannydet]

Rooting sounds so great but it's really not worth the risk especially if something goes wrong. Learn from this experience but Hadron speaks the truth.

 

[beannshie]

so can you still get into twrp? if so you might be able to just flash a custom rom.

here is as close to stock rom that i could find that is still custom made:
https://forum.xda-developers.com/lg-g6/development/rom-eu-lg-h870-10l-rom-t3633452

Yes I can boot into TWRP.
I've tried flashing installing this rom using TWRP but it says it's corrupted and returns an error.
I have completely deleted my android by accident.
I've also tried flashing it using fastboot but it says the system.img file is too big.

 

[Hadron]

What custom ROMs are there for that phone? Choose one, copy the zip onto your SD card (or ADB sideload if preferred) then flash using TWRP.

Once you've recovered, remember the first rule of root club: always take a nandroid (a system backup made using your custom recovery) before you flash anything, including the superuser package itself. If you'd backed up first then all you'd have to do now is go into TWRP and restore.

 

[Hadron]

Then you need to find another ROM. Or try downloading it again, and check the md5 sum to ensure it downloaded correctly (a ROM download that doesn't provide a checksum has come from a real amateur).

 

[ocnbrze]

What custom ROMs are there for that phone? Choose one, copy the zip onto your SD card (or ADB sideload if preferred) then flash using TWRP.

Once you've recovered, remember the first rule of root club: always take a nandroid (a system backup made using your custom recovery) before you flash anything, including the superuser package itself. If you'd backed up first then all you'd have to do now is go into TWRP and restore.

unfortunately this guide:
https://www.androidblog.gs/how-to-root-lg-g6-and-install-twrp-recovery-on-it/

does not include the step to make a nandroid backup. i agree that flashing anything should be done only after a nandroid backup is made.

now as far as the op have you tried any other roms? can you still get into twrp?