Question Display not on system power cycles

Apr 9, 2023
Hey so recently I’ve come across a problem, my system no longer displays a picture it’s just a black screen, as well the power just cycles on and off when I hold the power button the mother board light just flashes and it won’t turn off

What I’ve done so far is:

test gpu in another pc and it works
Replace cmos battery
Replace ram
Switch ram around
Tested psu

So it looks like it may be the mother board but anyone have any insight what else may cause this issue ?