I turn my PC on, it boots fine (I think) but no output gets displayed on my monitor. HDMI with my graphics card or onboard graphics does not work at all. When I use Displayport with my graphics card, the screen will start to wake, then go off. This continues in a loop. During this loop, my monitor will not allow me to access the settings or turn it off. I do not have a chance to see anything on the screen, I cannot even see the bios. Monitor works fine with my xbox.
I fixed this problem once when I reseated ram trying to determine if I had a faulty stick or dimm. Worked for 2 days and hasnt since then.
Motherboard - Asrock fatal1ty ab350 mini itx
CPU - AMD ryzen 5 2400g
Ram - 2x8gb g.skill ripjaws 3000
GPU - AMD rx 580
PSU - Corsair cx650 650w