Before,my PC was working I accidentally pressed the power button and it showed a pop up asking if you want to shutdown your PC.

Now my PC has no display after leaving it for a while and restarting it didnt do anything, still no display but my keyboard and mouse lights up so I tried pressing the power button at first but nothing happens, then I tried pressing the power button + pressing enter and the PC slowly shuts down

This also happened to me before, I left my PC for a while and no display again but after restarting a couple times, the display came back. Now it happened again

I don’t think my GPU is the problem here since it’s a “new” one, a used RTX 3060 TI. maybe could it be the monitor…

Or maybe it is my GPU because if my motherboard or RAM didn"t work pressing power button + enter would not work at all (that means windows would not load in the background if you know what i mean)

I need help