Monitor No Signal

Answer a couple of questions and get the exact fix.

Why does this happen?

A monitor showing 'no signal' is usually a cable, the wrong input, or a graphics driver. The fixer below starts with the most common cause — the cable — and works up from there.

Common causes

• A loose or faulty display cable.
• The monitor on the wrong input (HDMI 1 vs 2).
• A stuck graphics driver.
• The PC asleep or on a dead graphics port.

Symptoms

• The monitor shows 'No Signal'.
• The screen is black but the PC runs.
• Lines, flicker or artifacts appear.
• It happens after a reboot or driver update.

Frequently asked questions

Why does my monitor say no signal?

Check the cable is fully in on both ends, make sure the monitor is on the right input, and test the monitor on another computer to isolate the fault.

Why is my screen black but the PC is running?

Try waking it, check the input source, and restart the PC. If it recurs, update or reinstall the graphics driver.