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Projector diagnostics

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

Use display reference patterns and source-device checks to separate image/source/scaling problems from projector optics or hardware that require native controls/service.

Run these first

Relevant live checks

Screen Color TestDisplay full-screen red, green, blue, white, and black reference screens.
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Screen Gradient and Banding TestDisplay smooth gradients to inspect visible color banding.
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Screen Sharpness TestDisplay fine lines and text patterns to inspect scaling and sharpness.
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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

    Test a known local reference pattern

  2. 2

    Compare another cable/source/input

  3. 3

    Use projector focus/keystone/native resolution controls before service

What DeviceOK/browser can help check
  • Generate known visual reference patterns
  • Report browser/screen resolution context
What this browser page cannot prove
  • Measure projector luminance/color accuracy professionally
  • Inspect lamp/laser health
  • Control every projector service menu