Screen Defect Diagnosis: Is It a Dead Pixel, Stuck Pixel, Glow, or Burn-In?

Screen Defect Diagnosis: Is It a Dead Pixel, Stuck Pixel, Glow, or Burn-In?

You notice a dot, patch, or faint shadow on your screen. The hard part is not spotting it. The hard part is figuring out what it actually is.

People call almost everything a "dead pixel," but that is usually wrong. Sometimes it really is a dead pixel. Sometimes it is a stuck pixel. Sometimes it is IPS glow, backlight bleed, image retention, dust, or just a dirty panel catching the light in a weird way.

Test your screen now - go fullscreen and cycle white, black, gray, and RGB colors before you assume the panel is damaged.

Quick triage

• Black dot on white: likely dead pixel
• Bright colored dot on black: likely stuck pixel
• Patch near an edge on black: likely glow or bleed
• Faint shape or logo on gray: likely burn-in or image retention
• Speck that disappears after cleaning: not a panel defect

That is your starting point. Now confirm it properly.

Step 1: Clean the screen first

This sounds obvious, but it saves people a lot of unnecessary stress.

• Power the display off
• Use a clean microfiber cloth
• Look for lint, dried residue, or a tiny speck stuck to the surface

If the mark changes when you wipe it or only appears from certain angles, you may be dealing with dirt or coating texture rather than a pixel issue.

Step 2: Run a proper fullscreen test

Busy wallpapers hide defects. Solid colors expose them.

1. Open the Screen Test
2. Go fullscreen
3. Check White
4. Check Black
5. Check Red, Green, Blue
6. Check Gray

Scan slowly instead of darting your eyes around. Corners and center deserve the most attention because they matter most in actual use.

Step 3: Use color and motion to narrow it down

Once you find the suspect spot, ask a few simple questions:

• Does it stay fixed in the exact same place?
• Is it black on white?
• Is it bright on black?
• Does it look like a patch instead of a dot?
• Does it change when you move your head or lower the room lights?

That is usually enough to sort it into the right bucket.

What each defect usually looks like

Dead pixel

• Tiny black dot
• Easiest to see on white or bright colors
• Usually stays black
• Usually a hardware failure

Stuck pixel

• Tiny bright red, green, blue, or white dot
• Easiest to see on black
• May look different on color backgrounds
• Sometimes recoverable

IPS glow or backlight bleed

• Patch or haze, not a precise dot
• More obvious on black screens in a dark room
• Often near corners or edges
• Gets confused with pixel defects all the time

Burn-in or image retention

• Faint shape, shadow, logo, or UI outline
• More obvious on gray or muted colors
• Not a single pinpoint dot

Dust, dirt, or coating artifacts

• May shift or disappear after cleaning
• Can look worse at some angles than others
• Usually not fixed to the panel in the same way a pixel defect is

A simple diagnosis workflow

Use this logic:

• Black on white: treat it like a dead pixel until proven otherwise
• Bright on black: treat it like a stuck pixel first
• Broad patch on black: think glow or bleed
• Faint ghost on gray: think burn-in or retention
• Moves or wipes away: not a real panel defect

What to do after you identify it

If it is a stuck pixel

Try the safe stuck-pixel path:

• Run a flasher
• Re-test
• If you want to be more aggressive, try one careful pressure attempt

For that, go to How to Fix a Stuck Pixel.

If it is a dead pixel

Do not spend hours trying random fixes. Document it and decide whether to return or keep the display.

If you want the direct answer page, read Can Dead Pixels Be Fixed?.

If it is glow, bleed, or burn-in

The fix path is different, so do not treat it like a dead pixel. Use the right guide instead:

• IPS Glow vs Backlight Bleed
• OLED Burn-In vs Dead Pixels

When to document and return

Take photos and act quickly if:

• The defect is near the center
• There are several defects
• It is obvious during normal use
• You are still inside the retailer return window

Retailer returns are usually easier than arguing with a manufacturer pixel policy later.

Final check

Before you stop testing, run through this once:

• White screen for black dots
• Black screen for bright dots
• Gray screen for ghosting or retention
• Color screens for odd sub-pixel behavior

If you can name the problem clearly, you are already ahead of most people filing a vague support claim.

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Next steps: Run the Screen Test with white, black, gray, and RGB colors and save photos. If it is a stuck pixel, try How to Fix a Stuck Pixel. If it looks dead, read Can Dead Pixels Be Fixed?.