PC wont POST, please help

[SoulessPanic]

Hello everyone, i need your help. So i bought this pc January 2020 except from the PSU that i used from my old computer.

PC have been running smoothly and had no problems with it. The only problem i had from the beginning is that i was unable to run stable XMP profile.

I tried pretty much everything. In the end to make it work and be stable, i manually adjusted Voltage and Speed and its been running smoothly since then.

Until yesterday morning when i woke up and tried to power up to my suprise it wouldn't boot.

Fans were going crazy and only my CPU and top fan LED's were lighting.

First thing i did was to try to run with 1 stick of RAM, and voaala it worked ! PC booted again normaly and everything was ok.

After the successful boot i decided to update my BIOS to the latest version. Everything went ok and i even tried to shut it down and restart multiple times to make sure it would boot normally, and it did. This happened yesterday.

I woke up again this morning and same problem ! But now it wont boot whatever i try to do. I tried every combination of RAM/slots. I took out cmos battery to reset BIOS. I took out my GPU. Nothing works, it just won't boot. Same thing as yesterday.

The pattern is weird, yesterday morning it was the same but then it worked with 1 RAM and it was running all day no problems, and now this morning pretty much the same except nothings helps to make it boot.

I tested my brothers PSU on my PC, nothing changed. I tested my PSU on my brothers PC and its booting fine. PSU does not seem to be the culprit.

I dont know what do to at this point. Can you please give me any ideas ?

Specs:

CPU : Ryzen 3700X
GPU : Gigabyte Aorus 2080 Super
Mobo : Gigabyte x570 Aorus Elite, BIOS version : F30
RAM : 2x8 GB G.SKILL Ripjaws V 3600Mhz
PSU : XFX TS 750w

I am including a link for a video i took right now with the issue : https://www.youtube.com/shorts/RfpXJBaBTSs

[chudtopia]

If you have no RAM in does it beep?

[SoulessPanic]

Unfortunately it doesn't have a debug speaker, yep funny cause this is supposed to be a flagship.

 

I might have bricked it when updating the BIOS, and so i am trying now with everything removed except CPU and 1 RAM stick to flash back my previous BIOS version. 

 

I have downloaded my previous F11 BIOS verson file from official Gigabyte website and tried to flash back it using the USB Q-Flash port and the Q-Flash plus button on my motherboard. 

 

But the thing is, i am pressing the power button and the Q-Flash button on the motherboard but the Q-flash LED wont light up.

 

I hope i didnt completely killed my MOBO at this point.