Question Monitor shows no display when windows load

[Common Gamer]

Hi,
I'm facing an Issue where, when my windows load my display goes off says no signal, sometimes it work for 5-10 mins then shows no signal message and my system doesn't shuts down all CPU fan, Cabinet fans, PSU fan and GPU fans keeps running, when I try, press and hold power button it still doesn't shut down and doesn't restart even when I press restart button.
I replaced my motherboard thinking this was motherboard's issue but still same; then I replaced my CPU still same issue. I went to motherboard service centre and then they showed me that my motherboard is working fine with different CPU and RAM. But when insert my CPU and RAM then it give me an issue. I know Its not my CPU since I was facing this issue before I replace my CPU and this issue still persists even when I got new CPU. He also tried my RAM on different Motherboard and They were working fine. My PSU was also working in different system and My GPU is new I brought my GPU after I was facing this issue. Is this issue cause due to my RAM ? do I need to replace it too ? or because of motherboard CPU socket is not working properly maybe for my CPU its not reading some of the pins properly.
Bios is working fine showing all my specs properly. I didn't overclock or anything, even X.M.P profile is disable.

SPECs
CPU - AMD Ryzen 5 5600x
Motherboard - Gigabyte b550m gaming
RAM - 2x8GB GSkill ddr4 32000mhz
GPU - inno3D rtx 3050 8gb
PSU - coolermaster 650w

 

[kurdtnz]

What BIOS version is your motherboard currently running?

 

[Common Gamer]

What BIOS version is your motherboard currently running?

currently I'm using bios f15c
previously I was using bios f14e then change to f15a because I was facing this issue but still no change. then change to f15c still same issue

 

[kurdtnz]

Is your RAM on your motherboards QVL? (compatibility list?) Also, when you changed motherboards, did you do a clean install of windows?

 

[Common Gamer]

Is your RAM on your motherboards QVL? (compatibility list?) Also, when you changed motherboards, did you do a clean install of windows?

Yes, I think My RAM is on motherboards QVL because I used it for 3 months then I my old GPU was not working properly so gave it to service. they said you're motherboard is having some issue so I replaced it and since then I'm facing this issue.
Yes I clean install windows too. my ssd install windows is working fine with other build as well