The PC is turning on, but the monitor is showing 3 colors instead: red, green, and blue simultaneously.
I tried pressing
F10 after which I can hear the beep like it is going into BIOS, but the monitor is not showing anything different.
I've tried plugging another monitor, but with no results. What could be the problem?
P.S.: My PC is an HP ProOne 400 G2, the PC and the monitor are the same device.