Keyboard test
See which physical keys register, with QWERTY, AZERTY and QWERTZ layouts.
No observationCHECKLIST
Buying a used computer
A practical check of accessible peripherals. Also inspect the battery, ports, charger and hardware specifications separately: a browser cannot certify them.
Suggested time : 10 minutes · 0 / 7 observations saved
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Mouse test
Check left, right and middle buttons, scrolling and pointer movement.
No observation
Dead pixel test
Inspect your screen using clean, full-screen solid colours.
No observationDisplay gradient test
Inspect grayscale transitions and near-black and near-white detail.
No observation
Stereo speaker test
Identify left and right audio channels with short, quiet tones.
No observation
Microphone test
See your input level, select a microphone and listen to a short local recording.
No observation
Webcam test
Preview your camera, switch devices and inspect the delivered image.
No observation