PC Powers On but No Display – Troubleshooter

Build a safe first-check sequence from power signs, diagnostics, discrete GPU, monitor connection and RAM behavior.

✓ Method reviewed · 2026-08-22

CALCULATORFans spin but there is no video output. What should I check first?

Results are for information and preliminary estimation. For critical technical work, manufacturer data, local codes and qualified professional review take precedence.

CALCULATION ENGINEPC-NO-DISPLAY · R1.5.1Engine and route QA: PASS · Method and limits visible

Trust & methodology →

1Enter real inputs

2Press Calculate

3Read result with assumptions

Method & assumptions

How is it calculated?

The tree prioritizes low-risk connection and RAM checks. PSU or board-level measurements belong to qualified service.

Example

Example: With a discrete GPU installed, first verify the monitor cable is connected to that GPU.

What questions does this tool answer?

Fans spin but there is no video output. What should I check first?
pc turns on no display
computer fan spins no screen
How is PC Powers On but No Display – Troubleshooter calculated?

WHAT CHANGES THE RESULT

Check these before using the estimate

Computer and network tools provide practical capacity planning. Vendor limits, protocol overhead, codecs and real connection quality can move results away from theoretical values.