HELP PLEASE! Bootlooping phone, nothing helps - G4 Q&A, Help & Troubleshooting

i've tried everything, kdz, installing doc_test.zip, and its still in bootloop. I've got the lg logo and blue flashing light. It's bootloader unlocked, i have twrp installed. Bootlooped since i've tried installing CM 12.1
please help guys, i've been stuck with it for quite some time

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Phone stuck on LG logo.

I had messed my phone and reinstalled the stock rom using flash tools. it completed successfully but phone does not load, its stuck at lg logo.
any suggestion is highly appreciated.
problem solved.. Didnt do anything different, just tried the same steps 3-4 times, luckily it worked.

Soft bricked my M8: Best way to fix?

Greetings All,
So I did a very stupid move and kinda soft bricked my M8. I received my Lollipop update, restored my stock recovery, applied the update, rebooted phone, applied TWRP and flashed SuperSU. Once I booted back into phone I saw that I still had Xposed installed and bundled and the idiot that I am, ran the uninstaller. Now the phone boots up and after showing the white boot logo sits at a black screen.I can get into recovery mode so I am pretty sure that if I download a Lollipop custom ROM I can get booting again? Factory reset did not help and I did not do a nandroid either :/. I am still S-ON so I can't flash the RUU file :/.
Any assistance will be greatly appreciated.
Problem resolved. Please ignore this thread .

LG G3 D850 (AT&T Variant) Bootloop after Stock Firmware Restore

Hey guys,
I used this guide to restore the stock firmware: http://forum.xda-developers.com/showthread.php?t=2785089
It didn't succeed. Near the end, when phone rebooted, it got stuck in a bootloop.
I see the LG logo, the android man for a few seconds until it restarts again.
What should I do? I tried running the factory reset but that too does nothing but reboot it (again in the loop)
I am also having this same problem, if anyone could help/shed some light that would be great
Me too. I take days trying to find the solution.

LG D855 stuck in boot loop, even after factory reset

Hello,
I have a LG G3 D855 with unlocked bootloader and TWRP 3.0.2-0 and it had a relatively recent build of the official LineageOS ROM.
Everything was running fine, until suddenly, during a phone call, it shut down, and since then,each time I try to turn on the device, the LG logo appears for 20 seconds, disappears for 2 seconds, and then appears again, over and over again. I can still access the recovery thou.
So I have tried wiping everything, including system, data, and caches, repairing file systems, reinstalling the newest version of lineageOS, (my SD card slot doesn't work so i had to push the ROM file to the data partition using adb and installing it from there). I also tried using a different battery, and the same problem persists.
I am kinda hopeless now so I would appreciate any help I can get.
Many thanks.
I have the exact same problem. It started when I upgraded to latest TWRP. Flashing back to the normal TWRP didn't solve the problem and the boot looping is persistent now and TWRP is inaccessible.
I flashed to stock rom using LG flash tool 2014 and no matter what I try it still loops indefinitely with the new OS installed.

Please help. Lg G3 boots directly into TWRP / stuck into TWRP

I followed this guide https://forum.xda-developers.com/lg-g3/general/root-twrp-marshmallow-d855-30b-t3286268 and ended up with a infinite boot loop, so I tried flashing Marshmallow v30b with LGUP and now my phone is stuck in TWRP and always boots into it.
Please tell how can I fix this?

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