Question No video output after POST

[hotelrwanda]

After my system POSTS, I get a 'no signal' screen from my monitor and it goes to sleep.
9 times out of 10 this will happen, but when it boots properly everything works fine, no crashes or anything during use.
I've reseated the components/connectors and checked for shorts.
I've tried uninstalling the drivers with DDU and reinstalling them, updating the BIOS, resetting Windows, but the problem persists.
I've tried installing the GPU in a friend's system, and his in mine, and both booted with no issues.
The problem goes away if I uninstall the drivers or boot into safe mode.
I don't know what else to try.
OS: Windows 11 Pro
CPU: Ryzen 5 5500
GPU: Sapphire Nitro+ RX 6600 XT
RAM: G.Skill Ripjaws V 2x8GB DDR4-3200
Motherboard: Asrock A520M
PSU: EVGA 500 B1 500w

 

[rgd1101]

legit windows 11 pro?
malware scan the system?

 

[hotelrwanda]

I got the installation media from Microsoft's website but activated it with MAS.
Malware scan turns up negative.

 

[bignastyid]

We do not assist with pirated software. Thread closed.