You noticed a tiny dot on your screen that never changes color. Is it a dead pixel, a stuck pixel, or just dust? The difference matters β because stuck pixels can often be fixed, while true dead pixels usually cannot. Here's everything you need to know.
What Is a Dead Pixel?
A pixel is the smallest unit of a display β a tiny square that creates color by combining red, green, and blue subpixels. A dead pixel is one where all three subpixels are permanently off, appearing as a black dot regardless of what's on screen.
Dead pixels are caused by manufacturing defects, physical damage, or transistor failure over time. They're most visible on bright or white backgrounds.
Dead Pixel vs Stuck Pixel vs Hot Pixel
| Type | Appearance | Cause | Fixable? |
|---|---|---|---|
| Dead Pixel | Always black | Transistor failure (no power) | β Usually not |
| Stuck Pixel | Always one color (red, green, blue, white) | Subpixel stuck in ON state | β Often yes |
| Hot Pixel | Always white (all subpixels on) | Transistor failure (permanent ON) | β Rarely |
If your dot is colored (not black), it's likely a stuck pixel β much easier to fix. If it's always black with no glow, it's a true dead pixel.
How to Find Dead Pixels
The easiest method is to use a full-screen dead pixel test tool that fills your entire display with solid colors:
- Black test β Dead pixels are invisible on black; use white or bright colors instead
- White test β Dead pixels appear as black dots
- Red test β Blue and green defects appear as dark spots
- Green test β Red and blue defects appear as dark spots
- Blue test β Red and green defects appear as dark spots
Use our free Dead Pixel Test tool β it cycles through all these colors automatically in full screen with optional grid overlay for precise location.
How to Fix a Stuck Pixel
Stuck pixels can sometimes be unstuck using one of these methods:
Method 1: Pressure Technique
Turn off your display. Place a soft cloth over the stuck pixel and apply gentle pressure with a fingertip. Turn the display back on while maintaining pressure, then slowly release. This can sometimes free a stuck subpixel.
Method 2: Rapid Cycling
Use a pixel-fixing video or tool that rapidly cycles the stuck pixel through colors at high frequency. This electrical stimulation can sometimes reset a stuck subpixel. Many online tools do this β run them for 1β2 hours for best results. Our dead pixel test cycles colors that can help with this.
Method 3: Wait It Out
Some stuck pixels resolve on their own over days or weeks. Continue using your device normally β the thermal cycling from normal use sometimes unsticks them.
Can You Fix a Dead Pixel?
True dead pixels (black dots where all subpixels are off) are generally permanent. The transistor powering that pixel has failed and cannot be repaired without hardware replacement. Options:
- Warranty claim β Many manufacturers cover dead pixels under warranty, though policies vary (some require 3+ pixels, others accept 1)
- Display replacement β For laptops and phones, screen replacement is often available for $100β300
- Live with it β A single dead pixel in a corner is often not worth the cost of replacement
Dead Pixel Warranty Policies (2026)
| Brand | Dead Pixel Policy |
|---|---|
| Dell (UltraSharp monitors) | Zero dead pixel guarantee β 1 is enough for replacement |
| Apple (MacBook displays) | Typically requires multiple pixels or specific pattern |
| LG (monitors) | ISO 13406-2 Class II β allows up to 2 dead pixels |
| Samsung (OLED TVs) | Panel replacement if dead pixels visible at normal viewing distance |
| Most budget monitors | ISO standard β 5+ dead pixels required |
π₯οΈ Test your screen now: Use MyDeviceScan's free Dead Pixel Test β it runs in full screen with auto color cycling, grid overlay for precise mapping, and works on any device including phones and tablets.