Device diagnostics

See what's working on your hardware — free tests for your keyboard, mouse, screen, and refresh rate, each showing exactly what's wrong instead of a single pass/fail.

Keyboard Test

Check every key on your keyboard works.

Dead Pixel Test

Check your screen for dead or stuck pixels.

Mouse Test

Check your mouse's buttons, scroll wheel, and cursor tracking.

Monitor Refresh Rate Test

Check your monitor, laptop, or phone's real refresh rate.