My computer suddenly stopped displaying anything. The monitor wakes up as though it detects a connection, then reports no signal. I tested different DisplayPort and HDMI cables and ports, connected the monitor to my laptop to confirm it works, tried both the graphics card and the motherboard video outputs, and completely disassembled and reseated the components. The PC powers on and its fans spin, but there is no BIOS screen or other image, and the motherboard shows no warning lights. Could the power supply be failing, or are there other checks I should make?
1 Answer
It would help to list the complete system specifications, especially the CPU, graphics card, motherboard, RAM, and power supply. Also check whether the graphics card fans spin when the system starts. Fan movement does not prove the card is working, but it confirms that it is receiving at least some power and gives another clue for troubleshooting.

Thanks! I’ll try to find the full parts list. The graphics card fans do spin when I power the computer on.