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E-reader diagnostics

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

Use screen, touch, charging and browser/network checks where available, then rely on the device maker for storage, battery-health and firmware diagnostics.

Run these first

Relevant live checks

Touchscreen TestDraw on the screen to verify touch/pointer coverage.
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Dead Pixel TestShow solid colors full-screen so you can visually inspect for dead or stuck pixels.
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Screen Contrast TestShow dark and light level patterns for visual contrast inspection.
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Charger Wattage MatchCompare a device's entered power requirement with a charger's rated wattage while keeping USB-PD/PPS and voltage-profile limits explicit.
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Browser Online Status TestCheck the browser online state, available connection hints, and a short round trip to DeviceOK.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Restart using the maker's documented procedure

  2. 2

    Check whether touch/display failure occurs outside the browser too

  3. 3

    Verify cable and charger before assuming a battery failure

What DeviceOK/browser can help check
  • Display touch and screen reference tests in a capable browser
  • Check web connectivity
  • Plan charger wattage from entered specifications
What this browser page cannot prove
  • Measure e-ink refresh electronics
  • Read battery health generically
  • Repair storage or firmware