DeviTestFix a stuck pixel for free
A tiny colored dot that never changes, whatever is on screen? That's usually a stuck pixel. Rapidly cycling colors over it works in some cases, but it isn't guaranteed and it can't fix a dead pixel or OLED burn-in.
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What is a stuck pixel?
Every pixel is made of three subpixels: red, green and blue. When one or more of them gets stuck in the "on" state, the pixel shows a fixed color such as red, green, blue or white — even on a black background.
Stuck pixel vs. dead pixel
- Stuck pixel: always colored, easy to spot on black. It may sometimes respond to rapid color cycling, with no guarantee.
- Dead pixel: always black, visible on white. Usually a transistor failure that software can't fix.
Not sure which one you have? Run the dead pixel test first.
How to fix it, step by step
- Find the exact spot with the color test (black reveals stuck pixels best).
- Open the targeted fix and drag the flashing square over the pixel.
- Choose "Normal" or "Fast" speed and a 10–30 minute session.
- Leave the device running without looking at it; the tool asks the browser to keep the screen on, but if your device still dims or locks, temporarily turn off auto-lock.
- Check again. If the pixel is still there, repeat two or three times with different color patterns.
Does it always work?
There's no guarantee. It works best on pixels that got stuck recently, and the chances drop over time. If your device is under warranty and the fix doesn't help, check the manufacturer's pixel defect policy.
On OLED screens, a fixed shape may be burn-in rather than a stuck pixel — flashing doesn't fix burn-in.
Frequently asked questions
How long should I run the fixer?
Start with a 10–20 minute session over the pixel. If nothing changes, try again with a different speed or color pattern. Running it for many hours rarely helps more than a few shorter sessions.
Is the flashing bad for my screen?
No. Changing colors quickly is normal work for a display and doesn't wear it out in any meaningful way. The real risk is for people: don't watch the flashing if you are sensitive to flashing light.
Does pressing on the pixel help?
Some people gently massage the spot through a soft cloth, but pressing can damage LCD layers or a phone's OLED panel, especially on thin screens. Try the color cycling first, and avoid pressure on phones and laptops.