Dead pixels stay black. Stuck pixels stay colored. One is usually permanent — the other can sometimes be fixed. That is the essential difference. But the full picture is more useful when you are actually trying to diagnose what is on your screen.
What Is a Dead Pixel?
A dead pixel is a pixel that has permanently lost power. The thin-film transistor (TFT) controlling that pixel has failed, so no electrical signal reaches any of its three sub-pixels (red, green, blue). On an LCD, this means no light passes through the liquid crystal layer — the pixel stays black regardless of what is displayed. On an OLED, the pixel emitter simply never fires.
Key characteristic: A dead pixel looks identically black on every single background color. It does not change under any conditions.
What Is a Stuck Pixel?
A stuck pixel occurs when one or more sub-pixels are permanently powered on and cannot switch off. The sub-pixel is "stuck" in its active state, continuously emitting its color component regardless of the signal it receives.
The visible color depends on which sub-pixel or combination is stuck:
- Red dot: Red sub-pixel stuck on
- Green dot: Green sub-pixel stuck on (most common)
- Blue dot: Blue sub-pixel stuck on
- White dot: All three sub-pixels stuck on simultaneously
- Yellow dot: Red and green sub-pixels stuck on together
- Cyan dot: Blue and green sub-pixels stuck on together
- Magenta dot: Red and blue sub-pixels stuck on together
Key characteristic: A stuck pixel changes in visibility depending on the background color (a red stuck pixel blends into a red background), but its own color remains constant.
What Is a Hot Pixel?
A hot pixel is a term used primarily for image sensors in cameras, not display panels. It refers to a sensor element that produces an artificially bright reading due to electrical leakage, appearing as a bright dot in photographs — especially long-exposure shots.
When the term "hot pixel" is applied to a monitor or TV, the speaker almost always means a bright stuck pixel. For display diagnostics, the dead/stuck distinction is more practically useful.
Full Comparison Table
| Dead Pixel | Stuck Pixel | Hot Pixel | |
|---|---|---|---|
| Appearance | Always black | Fixed color (R, G, B, W, Y…) | Bright dot in camera images |
| Visible on black background? | No | Yes | Yes |
| Visible on white background? | Yes | Sometimes | Usually |
| Changes with background? | No — always black | Visibility changes; color does not | No |
| Root cause | TFT transistor failure | Sub-pixel stuck in ON state | Camera sensor leakage |
| Fixable by software? | Rarely | Sometimes (20–30% success rate) | Rarely |
| Covered by warranty? | Usually yes | Usually yes | Camera-specific |
How to Tell Them Apart
The definitive test is a full-screen color cycle.
- Open the dead pixel test tool and launch full screen.
- Press the right arrow key to advance through: Black → White → Red → Green → Blue → Gray.
- Observe the defective pixel on each background.
Result: same black dot visible on every light background, invisible on black → Dead pixel. The transistor has failed and the pixel receives no power.
Result: colored dot that becomes less visible or invisible on some backgrounds → Stuck pixel. On a red background, a red stuck pixel blends in completely. This disappearing-act on matching colors is the definitive sign.
Result: defect completely disappears on certain backgrounds → Stuck pixel. A true dead pixel never disappears on any background — it simply becomes invisible on black because black matches its own appearance.
Dead Pixel Colors and What They Mean
The color of a defect is diagnostic — it tells you which sub-pixel components have failed and what type of defect you are dealing with.
Black: The only color that confirms a true dead pixel. All three sub-pixels are off. Transistor failure. Almost never fixable by software.
Green: The most common stuck pixel color. The green channel corresponds to peak human visual sensitivity, making green stuck pixels appear particularly bright and prominent. Sometimes responds to pixel-cycling software.
Red: Red sub-pixel stuck on. Moderately visible; stands out most clearly against blue, green, and black backgrounds.
Blue: Blue sub-pixel stuck on. The least visually intrusive of the three primary color defects, though clearly visible on dark and warm-colored backgrounds.
White: All three sub-pixels stuck on simultaneously. Highly visible on any dark background. Rarer than single-channel stuck pixels because three independent failures must coincide.
Yellow / Cyan / Magenta: Two sub-pixels stuck on simultaneously. Less common than single-channel defects.
For a complete breakdown of what each color means, see the dead pixel colors explained guide.
Dead Pixel vs Dust, Dirt, and Scratches
Not every dot on a screen is a pixel defect. Before concluding you have a pixel issue:
- Power off the display — a fully dark screen makes surface debris much easier to spot.
- Wipe the screen with a clean, dry microfiber cloth.
- Power back on and run the color cycle test.
Signs of dust or dirt:
- The dot has irregular edges rather than the sharp square boundary of a pixel.
- It moves slightly or disappears after wiping.
- It sits on top of the screen rather than appearing to be inside it.
Signs of a pixel defect:
- The dot does not move and cannot be wiped away.
- It has clean, straight edges matching the pixel grid.
- It has been in exactly the same position for days.
Dead Pixel vs Screen Burn
Screen burn (burn-in) is a different phenomenon, most commonly affecting OLED panels. Burn-in appears as a faint ghost image or color shift across a large area of the panel — typically from a static element (taskbar, logo, on-screen display) displayed at high brightness for extended periods.
Dead and stuck pixels are isolated single-point defects. Screen burn affects regions of the panel. If you see a large discolored area rather than a single fixed dot, you are likely dealing with OLED burn-in rather than a pixel defect.
Which Can Be Fixed?
Dead pixels: Almost never. Transistor failure is a hardware defect with no software remedy. Panel replacement is the only reliable fix.
Stuck pixels: Sometimes. Pixel-cycling software rapidly flashes sub-pixels between on and off states at high speed, which can sometimes free a sub-pixel that is stuck in one state. Try the dead pixel fix tool on any colored pixel defect before filing a warranty claim.
Success rate for pixel cycling: roughly 20–30% of stuck pixels respond. The more recently the pixel became stuck, the higher the odds of recovery.
Frequently Asked Questions
Is a dead pixel always black?
Yes — a true dead pixel is always black because it receives no power at all. Any colored pixel defect (red, green, blue, white) is a stuck pixel, where one or more sub-pixels are permanently on rather than permanently off.
Can a stuck pixel become a dead pixel?
Occasionally. A sub-pixel that remains stuck in the on state for a very long time can eventually suffer transistor degradation from the constant current draw and transition to a dead (always-off) state. This is uncommon but does happen on older panels.
Does a stuck pixel count as a dead pixel for warranty purposes?
Usually yes. Most manufacturer warranty documents use "dead pixel" or "defective pixel" to cover both dead and stuck pixel types. Check your specific warranty documentation for exact language.
Can I fix a dead pixel myself?
Not without replacing the panel. Software methods do not work on true dead pixels. Pressure massage techniques are unreliable and risk additional panel damage — avoid them.
How do I know if my pixel is dead or stuck?
Run a full-screen color cycle test. If the defect is black on every background, it is a dead pixel. If the defect has color and becomes less visible on matching-color backgrounds, it is a stuck pixel.