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LG G2 not booting after installing 6.0 ROM

Hello, I had some issues with my LG G2 while attemping to flash a new rom, here's my problem:
I checked for the latest crDroid 6.x rom and the gapps, everything went fine, I flashed the rom with no problems at all and then continued with the gapps. But here's the problem, when I tried to boot it, nothing popped out from the display, just the LG logo, then it was completely black. After trying to install another custom rom (cm 13 nightly), nothing happened. Then, I tried to go back to my AICP rom. I had to use ADB installer since I didn't have any zips avaiable, but when I tried to install tk gapps (downloaded from the AICP forum), Error code: 20 came out. I did a research, and this looks weird, because that error only pops when the gapps are not compatible with the current rom, but clearly they were. Any ideas on how to fix this up?

Avrammm said:
Hello, I had some issues with my LG G2 while attemping to flash a new rom, here's my problem:
I checked for the latest crDroid 6.x rom and the gapps, everything went fine, I flashed the rom with no problems at all and then continued with the gapps. But here's the problem, when I tried to boot it, nothing popped out from the display, just the LG logo, then it was completely black. After trying to install another custom rom (cm 13 nightly), nothing happened. Then, I tried to go back to my AICP rom. I had to use ADB installer since I didn't have any zips avaiable, but when I tried to install tk gapps (downloaded from the AICP forum), Error code: 20 came out. I did a research, and this looks weird, because that error only pops when the gapps are not compatible with the current rom, but clearly they were. Any ideas on how to fix this up?
Click to expand...
Click to collapse
for your rom to boot you need hybrid bootstacks
wipe all/flash hybrid/ go to main menu/ then reboot into recovery from recovery/ once in recovery again proceed to flash rom and gapps.
use the one for your variant
http://forum.xda-developers.com/lg-g2/development/boot-g2-hybrid-bootstacks-t3183219

after flash lineage 14, twrp can't go into system.

I have one XT1570(china version with dual sim), falsh lineage 14.1( the latest nightly one) , gapps with twrp, after flash both of them, I click "reboot", then "system". it can't go inside the system, still show with twrp ui.
Now I tried few times, still the same.
But if click "reboot", then "bootloader", after screen goes up, press power button"start", it looks the initiation of android system, but it last for hours, still loading screen.
Any suggestion for this problem?
Thanks.

Los 14.1 is for Marschmallow, one(?) build is for Nougat.
Xt1570 - Lolipop, if you didn't flashed any upper stock rom. @tigerszheng

the original one is Android 7.0 Nougat™ NPH25.200-15, I think this is the previous rom, but when I do factory reset, it boots into twrp directly.
Since I originally want to flash the lineageos 14.1 for clark, so I download the lineage-14.1-20171106-nightly-clark-signed.zip, and the gapps*.zip,
that's the content I used to flash with twrp, but the problem seems that the rom doesn't work properly. or maybe because the xt1570 default to boot into the recovery(twrp)?
not sure about what's the problem of this?
Thanks.

Try AOSP ext. for 7 modem:
https://forum.xda-developers.com/moto-x-style/development/collection-random-projects-t3662970
@tigerszheng

(SM-T560) Can not update from CM13.1 to Viper 7.1.2, device stuck on boot logo

Hi all,
So I had this UK version of T560 for a while which was stuck on 4.4, so I found the CM13 rom for T561 and installed it.
I used Odin to install TWRP 3.0.2-1, and then flashed the CM13 rom, ARM Pico 6.0 GApps, superSU latest (2.85 I think..?), and the boot image and the hotkeys fix it required.
This ROM worked great, apart from some wifi connection issues (wifi slow and easily disconnected) and I couldn't connect the tablet to my PC through USB so I had to use my USB micro SD adapter to transfer all files. However the rom itself was stable and easily installed on the first try.
I then wanted to upgrade to the CM14.1 rom for T561, and followed Android Doctor's youtube tutorial (/watch?v=FmRtueImtlw) but this rom was stuck when booting on the boot logo. I would leave the tablet to boot for an hour but it didn't boot, so I tried using SuperSU instead of Magisk 11.6 used in the video, but I never managed to get this rom working, so I went back to the CM13 rom.
Now I've seen the thread for the new Venom 7.1.2 rom, so went and tried to install the rom, but the same thing happened.
My process:
transfer necessary files to tablet with USB micro SD adapter.
wipe data/factory reset
install venomfullv2
install opengapps 7.1 arm pico
install magisk 20.1
reboot
that didn't work, still stuck on the boot logo
I then also tried:
- wipe everything except Micro SD and internal then reinstalling
- wipe everything except Micro SD then reinstalling
- installing without root
-installing both venom v1 and v2 versions
- installing SuperSU instead of Magisk
- installing with and without the boot.img patch that was needed for the LOS14.1 rom
Things I noticed:
- when the venom rom is installed, TWRP says
"INSTALLING ROM FINISHED
script succeeded: result was [ ]"
- USB OTG can't be wiped, red text shows up
same result happens every time, everything installs fine and then the boot logo just keeps looping on the first boot, I usually let it boot for at least 20 minutes before I turn off the device or boot back into TWRP.
Does anyone have any suggestions to get this Venom v2 rom to work?

extract boot.img from v2 zip...flash all normally ,change to install image on TWRP an flash boot.img as boot.....then reboot

gitanillo87 said:
extract boot.img from v2 zip...flash all normally ,change to install image on TWRP an flash boot.img as boot.....then reboot
Click to expand...
Click to collapse
Thank you for the tip, but unfortunately it is still not working.. Really don't know what else to try

GAPPS stuck on "Mounting partitions" in TWRP. Help.

So I'm new to this whole custom ROM scene but I'll get straight to the point. I installed Resurrection Remix on my Moto E4 and then I flash GApps but it got stuck on "Mounting partitions" and stayed stuck for like an hour. I tried a different version of GApps then and the same thing happened. I don't know what to do and I have no clue what's even happening. Please someone explain this to a noob so I can get GApps installed on this phone. Mind you that Resurrection Remix installed fine and was even running when I booted the phone.

Having the same issue... Did you find a solution?

The issue was that I was booted into TWRP through fastboot instead of through a flashed recovery. Once I flashed the recovery partition and booted there, everything worked fine.

LineageOS 17.1 + GApps + TWRP bootlooping

I am unable to start this configuration. I have the latest TWRP 3.2.1.0 and tried installing the latest two versions of the packages:
lineage-17.1-20210522-nightly-oneplus2-signed
open_gapps-arm64-10.0-pico-20210526
I wiped everything before flashing. The LineageOS logo is shown for a while and then the phone boots back into TWRP. Each time it is asking for a decryption password however. Is there something I did not yet clear?