I have a Gigabyte Radeon RX 5700 XT OC 8G mounted on a Gigabyte B550M Aorus Pro-P motherboard with a Ryzen 5 5600 X. Has been working flawlessly for almost two years. Some weeks ago the screens didn't startup when powering up the computer.
When the computer starts up some leds flashes on the graphics card and the fans starts for about 1 second, then the graphics cards turn off. Nothing is output on the screens. It seems like the PC continues to boot properly.
I have tried to swap the graphics card with another desktop. It is a Asus Cerberus GTX1050Ti-O4G on a Asus Prime B360M-A motherboard with a Intel i7-8700.
My Radeon board seems to work just fine on the Prime B360M-A motherboard and the Cerberus board seems to work just fine on my B550M Aorus motherboard. Strange?
I have also tried to replace the PSU on my computer with a new one but the behaviour is the same.
Anybody with ideas of what might be wrong or any suggestions of what else I could try to get any clues.