Monitors & displays

Screen randomly goes black while using the computer

Random, brief blackouts during use are usually caused by power-saving settings, a graphics driver crash, or a loose cable rather than a dying monitor.

Difficulty
Moderate
Time
20–45 minutes
DIY cost
$0–$15
Pro cost
$80–$200

Symptoms

  • Screen goes black for a second or more, then comes back
  • Happens randomly, not tied to any specific action
  • Sometimes the screen doesn't come back until you move the mouse or press a key
  • Happens more often under heavy use like gaming or video playback

Likely causes

  • CommonGraphics driver crashing and recovering (TDR event)Windows can detect a graphics driver crash, reset it, and briefly blank the screen while doing so.
  • CommonPower-saving/sleep settings triggering unexpectedlyAggressive sleep or display-off timers can cause unexpected blackouts.
  • CommonLoose video cableA cable barely making contact can drop the signal briefly under vibration or heat.
  • PossibleOverheating graphics cardA GPU that overheats under load can drop its display output until it cools slightly.
  • PossibleFailing power supply (desktops)An unstable PSU can cause brief power drops that blank the screen.

What to do

  1. Update the graphics driver to the latest stable version and restart the computer.
  2. Check Windows Event Viewer (search 'Event Viewer') under 'System' logs for repeated display driver crash or TDR errors around the time of the blackouts.
  3. Adjust Power Options so the screen and sleep timers are set to reasonable, non-conflicting values.
  4. Reseat the video cable firmly at both ends and try an alternate cable.
  5. Monitor GPU temperature using a free tool like HWMonitor during heavy use to check for overheating.
  6. For desktops, listen and feel for excess heat, dust buildup, or unusual noise from the power supply and graphics card.
  7. If blackouts happen mainly under load, clean dust from fans and vents, and ensure the case has adequate airflow.

Tools and parts

  • Compressed air (for dust cleaning)

When to call a pro

If temperatures are normal, the cable is good, and the driver is updated, but blackouts continue, especially under load, have a technician check the power supply and graphics card.

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.