Monitors & displays

DisplayPort monitor shows no signal

DisplayPort 'no signal' issues are usually a connector that isn't fully seated, a cable that doesn't support the needed resolution, or a sleep/wake handshake problem.

Difficulty
Easy
Time
10–25 minutes
DIY cost
$0–$20
Pro cost
$60–$100

Symptoms

  • Monitor shows 'No Signal' over DisplayPort specifically
  • Screen goes black after the computer wakes from sleep
  • Switching to HDMI on the same monitor works fine
  • Cable feels loose or doesn't click into place

Likely causes

  • CommonDisplayPort cable not fully clicked inDisplayPort connectors have a locking clip that must seat fully to maintain a stable connection.
  • CommonCable doesn't support the resolution/refresh rate in useOlder or cheap DisplayPort cables may not handle high resolutions or high refresh rates reliably.
  • PossibleMonitor or GPU DisplayPort version mismatchMixing very old and very new DisplayPort standards can cause handshake failures.
  • CommonSleep/wake handshake failureSome GPU and monitor combinations fail to re-establish a DisplayPort signal after the PC sleeps.

What to do

  1. Firmly push the DisplayPort cable in until you feel or hear the locking clip engage at both ends.
  2. Try a different DisplayPort cable, especially if the current one is unbranded or very long.
  3. If the monitor has both DisplayPort and HDMI, test HDMI to see if the problem is DisplayPort-specific.
  4. Update the graphics driver, since DisplayPort sleep/wake issues are frequently fixed in newer driver releases.
  5. In the graphics driver's control panel (NVIDIA or AMD), disable any DisplayPort power-saving or 'deep sleep' features if present.
  6. Lower the resolution or refresh rate temporarily to see if a high setting is beyond the cable's supported bandwidth.
  7. Reboot with the cable connected rather than waking from sleep, to see if the issue is specific to wake-up handshakes.

Tools and parts

  • None
DisplayPort cableSearch: “DisplayPort 1.4 cable”

When to call a pro

If the problem only happens on wake from sleep and persists after a driver update, it's often a known compatibility quirk between that GPU and monitor model; check the manufacturer's support site or consider using HDMI instead.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.