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Laptop diagnostics

Test what the browser can see. Know when it cannot.

Run a browser-first inspection of screen, keyboard, pointer, camera, microphone and speakers, then use the manufacturer diagnostic for battery, ports, storage and internal hardware.

Run these first

Relevant live checks

Dead Pixel TestShow solid colors full-screen so you can visually inspect for dead or stuck pixels.
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Keyboard TestPress keys and verify that the browser receives the expected keyboard events.
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Mouse Button TestVerify left, right, middle, and extra mouse button events.
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Webcam TestOpen your webcam locally to verify that the browser can access and display a live camera stream.
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Microphone TestCheck whether your browser can detect your microphone and receive live audio.
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Left Right Speaker TestPlay left and right channel tones separately.
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Screen Resolution TestShow browser viewport, screen dimensions, and device pixel ratio.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Run the used/new laptop guided check

  2. 2

    Record which components fail independently

  3. 3

    Use the exact manufacturer's diagnostics for protected internal hardware

What DeviceOK/browser can help check
  • Test common user-facing input/output components
  • Display visual screen patterns
  • Check browser-visible camera and microphone paths
What this browser page cannot prove
  • Read SSD SMART health or RAM faults generically
  • Measure battery-cell health universally
  • Test every USB-C charging/Thunderbolt electrical path