LG G4 stuck in bootloop, cannot enter download mode - G4 Q&A, Help & Troubleshooting

I am using the LG G4 LG-F500S(Korean) which is stuck in bootloop after upgrading to Android 7.0 Nougat. I tried the flashing method with the .kdz file but I can't enter download mode.
Are there any solutions?

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LG G3 D855 Shuts down after LG Logo

Hi Guys,
My LG G3 D855 32 GB cannot start after LG Logo. It doesn't go to download mode and recovery mode. I tried to downgrade to KitKat from Lolipop using the LG Flash tool + Tot File method. It failed in 16% and now i cannot go to download mode or recovery mode. It goes LG Logo and shuts down. I have swapped batteries, it doesn't even go to the firmware update page. I don't know whether it gor bricked. Please help me with a solution.

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LG G3 stuck in download mode?

Hello, my lg g3 has gone strange. Whenever I try to enter the system, it goes into download mode for some random reason? Is there a fix to this and is it bricked? It is running android kitkat 4.4.2
Was the phone in the middle of any upgrade or it went by itself to Download mode?

LG G4 stuck on firmware update

My LG G4 doesn't boot into download mode and LGUP doesn't recognize it. Whenever I power on my phone it boots to firmware update screen and it says: 633A B100 modified. The problem is that I can't do anything. I can't go into download mode or recovery.
This question is similar but I can't find the solution.
https://forum.xda-developers.com/g4/help/lg-g4-stuck-firmware-update-screen-t3675998

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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