A dead pixel is a single point on the screen that stays permanently black because the transistor that drives it has failed, so it never lights up. A stuck pixel is different: it stays fixed on one color such as red, green, blue, or white, and can sometimes be revived. Dead pixels are a panel fault and usually cannot be repaired at home, while stuck pixels sometimes clear.
Why this happens
- A dead pixel occurs when the tiny transistor controlling that pixel stops working, so it receives no signal and stays dark.
- A stuck pixel happens when one subpixel (red, green, or blue) is locked on or off, showing a constant color dot.
- Manufacturing defects are the most common source, as no large panel is guaranteed perfect.
- Physical pressure or impact on the screen can damage pixels.
- Aging and heat can cause pixels to fail over the life of the display.
Is this normal?
A small number of dead or stuck pixels is common enough that many makers list an allowed amount in their pixel policy before a screen qualifies for warranty replacement. One or two faint dots is often considered within normal tolerance.
Does it cause any problems?
A single dead pixel does not spread and does not harm the rest of the screen. It is mainly a cosmetic annoyance. Stuck pixels are also cosmetic, though they are more noticeable because they glow.
How to fix or check it
- First identify the type. Display a full-screen black image to spot dead (dark) pixels, then cycle full red, green, blue, and white images to spot stuck (colored) pixels.
- For a stuck pixel, run a pixel-fixing tool or video that rapidly cycles colors on that spot for several minutes to an hour, which can sometimes free it.
- As a last resort for a stuck pixel, gently press the exact spot with a soft cloth while the screen is on, using very light pressure. This carries some risk, so it is optional.
- Accept that a truly dead pixel, caused by a failed transistor, cannot be revived by software or pressure.
- Check the warranty. Many manufacturers replace a screen once the number of defective pixels passes their stated limit, so read the pixel policy and contact support if it qualifies.
- These methods apply to laptop and external monitor panels, and to both LCD and OLED screens, but never press hard on any screen.
Frequently asked questions
Will one dead pixel spread to others?
No. A dead pixel is an isolated transistor failure and does not affect neighboring pixels. More dead pixels appearing later are separate faults, not spreading.
What is the difference between dead and stuck pixels?
A dead pixel stays black and cannot be fixed. A stuck pixel shows a fixed color and can sometimes be cleared with color-cycling software or gentle pressure.
Can I get a screen replaced for one dead pixel?
It depends on the maker's pixel policy. Many allow a few defective pixels before offering a replacement, so check your warranty terms.