How to tell stuck pixels from dead pixels

Symptoms

• Small dot of one color (often red, green, or blue) that never changes
• Dot is visible against most backgrounds, not just white
• Multiple small colored dots in a cluster
• Dot doesn't respond to normal screen content changing around it

Likely causes

• CommonSubpixel transistor stuck in the 'on' positionUnlike a dead pixel, a stuck one is still receiving power, just not switching correctly.
• CommonPressure applied to the panel during manufacturing or transportThis is the most common cause and is sometimes reversible.
• PossibleStatic or driver-level glitch mistaken for a stuck pixelOccasionally what looks like a stuck pixel is a temporary rendering glitch that clears on its own.

What to do

1. Run a full-screen solid black test image; a stuck pixel will still show its color while a dead pixel stays invisible.
2. Cycle through solid red, green, blue, and white screens to see if the dot's color changes or stays fixed.
3. If it stays one color on every background, it's stuck; try a pixel-fixing flashing pattern video for 10–20 minutes.
4. Turn the monitor off and gently rub the exact spot with a soft cloth in a small circular motion, then turn it back on and retest.
5. Repeat the flashing pattern and gentle massage once more if the first attempt doesn't work, but stop if you see any new damage.
6. If it doesn't resolve after two attempts, treat it as a cosmetic defect and check the manufacturer's dead/stuck pixel policy.

Tools and parts

• Soft microfiber cloth

When to call a pro

For monitors still under warranty, contact the manufacturer instead of attempting repeated pressure fixes, since some warranties are voided by signs of tampering.

Safety