Used Monitor Inspection

A five-minute checklist for an in-person second-hand purchase.

Best run in fullscreen with consistent room lighting · About 5 minutes · 4 recommended steps

1 of 5 · ⌗ resolution

Confirm the basics first.

These are browser-reported values. They describe the active display environment and can be affected by scaling.

Browser-reported display

Detecting display information…

Frequently asked questions

Can I inspect a used monitor before I pay for it?

Yes. The inspection runs in a browser you bring along, so you can complete the essential checks at the seller's location in a few minutes.

What matters most when checking a used monitor?

Pixels that stay lit or dark, bright edge areas and large uneven patches are hard to fix later. Record what you see and weigh it against the asking price.

Is this inspection enough to judge long-term reliability?

No. It covers what you can observe on site in minutes. Aging behavior and long-term uniformity only show over time, and remain your own observation.