useforfreeWhat this does
This dead pixel test fills your screen with solid colours so faulty pixels stand out. A dead pixel is a tiny black dot that never lights up. A stuck pixel stays one colour, showing as a bright dot on black or a wrong-coloured dot elsewhere. The fixer flashes colours quickly, which can sometimes bring a stuck pixel back.
How to use it
- Wipe your screen clean so dust isn't mistaken for a dead pixel.
- Press Start full-screen test (or pick a colour).
- Click, tap, or use → and ← to move through the colours.
- Look closely for any dot that's the wrong colour.
- Press Esc to exit. For a stuck pixel, run the fixer over the spot for a few minutes.
FAQ
What is the difference between a dead and a stuck pixel?
A dead pixel stays black on every colour because it gets no power. A stuck pixel stays on one colour — red, green or blue — because one sub-pixel is fixed on. Stuck pixels can sometimes be fixed; dead pixels usually cannot.
How do I find a dead pixel?
Go full screen and step through each solid colour. Look closely for any dot that stays the wrong colour: a black dot on the white or coloured screens, or a bright dot on the black screen. Clean the screen first so dust isn't mistaken for a dead pixel.
Can the fixer repair a stuck pixel?
Sometimes. The flashing mode rapidly cycles colours, which can nudge a stuck pixel back to life. Run it over the stuck area for several minutes. It will not fix a truly dead pixel.
Is this test safe for my screen?
Yes. Showing solid colours is harmless. To be cautious, don't leave a single static colour on an OLED screen for a very long time, and avoid the flashing fixer if you are sensitive to flashing lights.