SCREEN 📌 Quick Summary: A used monitor test helps you identify hidden defects before buying a second-hand display. Our free online tool checks for dead pixels, ghosting, burn-in, and uniformity issues in under 60 seconds.
Used Monitor Test — Free & Online
Buying a used monitor can save you hundreds of dollars — but only if you know what you're getting. Hidden defects like dead pixels, ghosting, and burn-in can ruin your experience. Our used monitor test helps you inspect a second-hand display before you commit.
What to Check on a Used Monitor
- Dead pixels — Permanently black dots that never light up
- Stuck pixels — Pixels stuck on one color
- Ghosting — Motion blur and trailing
- Burn-in — Permanent ghost images (OLED)
- Uniformity issues — Clouding, backlight bleed
- Scratches — Physical damage on the panel
How to Test a Used Monitor
- Bring a laptop or phone — You need to access our website.
- Connect to the monitor — Via HDMI or DisplayPort.
- Open our tool — On the connected device.
- Run the test — Click "Start Full Diagnosis".
- Inspect each color — White, black, red, green, and blue.
- Document any defects — Take photos for negotiation.
Why Test a Used Monitor?
- Save money — Avoid buying a defective monitor
- Negotiate price — Use defects as leverage
- Peace of mind — Know exactly what you're buying
- Avoid returns — Most used sales are final
What to Look For
- Black dots on white screen — Dead pixels
- Bright dots on black screen — Stuck pixels
- Trails behind moving objects — Ghosting
- Faint ghost images — Burn-in
- Uneven brightness — Uniformity issues