Stuck pixel fixer
A stuck pixel is powered but locked onto one colour. This page runs the standard fix attempt: cycling that pixel and its neighbours rapidly through white, black and the three colour primaries in the hope that the repeated switching frees whatever is holding it in place.
Run the flasher
Your system is set to reduce motion. The flasher still requires you to opt in below — nothing starts automatically.
How the technique works
A stuck pixel is a subpixel transistor holding steady in one state — fully on or fully off — instead of switching normally with the rest of the image. The rapid colour-cycling technique drives that same subpixel through repeated full-swing transitions: off to on and back again, across red, green and blue in turn. On some panels, that repeated forced switching is enough to free the transistor and let it respond normally again. It is not a guaranteed fix and nobody fully understands why it works on some pixels and not others — it is simply the best-known attempt, cheap enough to try before assuming the defect is permanent.
What it cannot do: fix a dead pixel (one receiving no power at all — there's nothing to cycle), or guarantee a fix for any specific stuck pixel. Some stuck pixels never resolve no matter how long this runs.
How to use it
- Read the photosensitivity warning above. If you have any history of seizures, migraines with visual aura, or discomfort from flashing lights, do not proceed.
- Check the acknowledgement box — the start button stays disabled until you do, and it never starts on its own.
- Click Start flashing. The page will try to enter fullscreen so the flashing fills as much of your field of view as possible, which is where the stuck subpixel actually needs the cycling to happen.
- Let it run for a few minutes, then press Esc or click anywhere to stop, and check the spot against a solid colour from the main test to see whether anything changed.
- If there's no change after a few sessions, further attempts are unlikely to help — see the honest limits below.
Honest expectations
- This works on some stuck pixels, not all of them, and never on a genuinely dead pixel.
- There is no fixed number of attempts or amount of time that guarantees a result either way.
- If a stuck pixel doesn't respond after a few sessions, it is reasonable to treat it as permanent rather than continuing indefinitely.
- Nothing about running this puts unusual stress on the display — the caution here is entirely about photosensitivity for the viewer, not about any risk to the screen.
Frequently asked questions
How long should I run the stuck-pixel flasher for?
There's no fixed reliable duration because results vary by panel and by what caused the stuck pixel in the first place. A common approach is a few minutes at a time, checking against a solid colour afterwards, rather than leaving it running unattended for hours. If several short sessions make no difference at all, further attempts are unlikely to change that.
Will this work on a dead pixel?
No. A dead pixel receives no power at all, so there is nothing for rapid colour cycling to influence. This technique only has a chance on a stuck pixel — one that is still powered but locked showing one colour.
Is there a risk of damaging my screen by doing this?
Displaying rapidly changing colours is not meaningfully different from displaying any other video content, so it does not put unusual stress on the panel. The real risk with this technique is to the viewer, not the screen — the photosensitivity warning above is the one that matters.
Why does the flasher use a fixed set of colours instead of random ones?
Cycling through white, black and the three colour primaries drives every subpixel through both its fully-on and fully-off states repeatedly, which is the actual mechanism the technique relies on. Adding more intermediate shades would not exercise the subpixels any further, so it would only add complexity without adding effect.