How the result is formed
The guided check records what you see on static black, white, red, green, and blue screens. The site compares your answers with common signs of stuck pixels, dead pixels, dust, uneven brightness, and software problems. The result is based on your answers, not automated visual inspection.
What it cannot do
- See a physical pixel, inspect a photo, or guarantee a diagnosis.
- Repair a transistor or guarantee that changing colors will help.
- Promise warranty eligibility or keep manufacturer policy details current forever.
- Replace manufacturer tests, professional service, or accessibility or medical advice.
How we choose sources
We prefer current official pages for pixel definitions, built-in tests, warranty information, and OLED maintenance. Third-party utilities are useful product references but not authorities on coverage or safety.
- Apple — LCD pixel anomalies
- Dell — display pixel guidelines
- Dell — built-in monitor diagnostics
- EIZO — monitor test
- LG — OLED pixel cleaning
- Apple — OLED image persistence
- Dell — laptop LCD built-in self-test
- Dell — LCD light leakage guidance
- Sony — OLED panel refresh guidance
- Samsung — screen cleaning guidance
- W3C — flashing-content safety