Help LG G5 VS980 not booting properly problem - LG G5 Questions & Answers

Hi, I was using my LG G5 while plugged in, all of a sudden it acts weird, app crashes, lags and a few part of the screen goes black for a short moment. It then shuts down and restart itself, but stuck on some sort of a bootloop (it passes the logo screen but then the LCD goes black and keeps turning itself on and off repeatedly with nothing in it, also the LED light is showing blue)
I took off the battery, put it back in, and turned it on. But it ended up the same. So then I went to the system recovery menu. The recovery menu works just fine. However I've tried using its safe mode, wipe cache, factory data reset, continue power up, and none of them seems to work. It just stuck on that bootloop.
Since I was getting desperate, I left the phone in the bootlooping state for awhile.. at some point it started normally and goes to the choose your language menu (because of the factory reset I guess). I was so relieved, until it restarts itself again.
I've tried replacing the battery with a new one, also doesn't work. There is no LG service center in my city, and I have no warranty whatsoever over this phone because I bought it online. I couldn't find anyone with the same problem.
Here's a video showing you the problem:
ttps://youtu.be/OLt2MD8LFNs (add an H at the beginning)
Help guys.. What should I do and how to fix this?

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I need your help.
I was using my phone normally when suddenly some official app crashed, i pressed the report by email button, but nothing happened, the phone freezed. So i just pressed the power button to restart the phone.
Now i can't turn it on ! Everytime it reaches the samsung logo, i get a cycle of 1 vibration followed by 3 vibrations a few seconds later. Those vibrations keep repeating until the phone decide to restart and the problem repeat itself.
tiny good news : I was able to enter TWRP recovery mode, and switch off the phone in order to be able to start it in "Safe mode".
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Here is my solution for others who might encounter this issue:
Being able to enter safe mode but not normal mode told me it was an app that bugged...
Something probably went wrong with the Pebble Time application: i've uninstalled it through the play store (in safe mode), and then.... i managed to reboot in normal mode again ! (and i reinstalled the pebble time app again, no more problem even after rebooting).
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