Dead Pixel Test · Guide
Dead Pixel vs Stuck Pixel
Both faults are single dots, but they behave differently across colours. This page explains the difference so you can judge what you see during the free dead pixel test — a visual check only. Nothing here repairs pixels.
The one-sentence difference
A dead pixel receives no power and stays black on every background — white, red, blue, all nine fields. A stuck pixel still receives power but is frozen on one colour, so it glows red, green or blue against dark backgrounds and may vanish on white.
That is why the test cycles through all nine colours: black exposes stuck pixels, white confirms dead ones, and the red, green and blue fields isolate each subpixel to show which kind is faulty.
How dust fools the eye
Dust and grease sit on the glass above the panel, so they look blurry and slightly raised. Tilt the screen: dust shifts relative to the image, while a faulty pixel stays sharp, fixed and exactly one dot wide.
If the spot changes when you tilt the display or disappears after a gentle wipe with a soft, dry microfibre cloth, it was never a pixel. Run the test again on a clean screen before deciding.
What to record, and what not to expect
Mark a suspect on the screen map on the main test page, then download the text summary. The file is labelled “User-reported visual inspection”: it records what you saw — it does not prove a defect and is not a repair certificate.
There is no repair function here: no flashing fixer and no pressure or massage instructions, which can damage a panel. A truly dead pixel almost never recovers; a stuck pixel sometimes returns to normal on its own over time. For a possible fault, contact the manufacturer or seller and check their pixel policy.
Honest limits: this guide helps you identify possible display problems with your own eyes. It cannot repair hardware pixels, diagnose your display automatically, or decide warranty claims. Read the limits.
Guide FAQ
How can I tell a dead pixel from a stuck pixel?
Check the dot on black and on white. Black on every colour means a suspected dead pixel; a dot that glows one fixed colour on dark fields but vanishes on white means a suspected stuck pixel.
Can this site fix a dead or stuck pixel?
No. It only shows solid colour fields for your own visual inspection. It offers no flashing fixer and no repair instructions.