How to Use the Dead Pixel Test
Testing for dead pixels is simple but requires patience and attention. Click each color above to fill your entire screen, then slowly scan every area of your display with your eyes. Dead pixels show up as tiny spots that don't match the background color - they're usually just a single pixel, so you need to look carefully. It's easiest to spot them on solid white and solid black screens.
Make sure you check the corners and edges too - dead pixels can hide anywhere on the panel. If you just bought a new monitor, running this test right away is a good idea so you can return it within the warranty period if you find issues. Don't wait until the warranty expires to discover a defect.
Dead Pixel vs. Stuck Pixel vs. Hot Pixel: What is the Difference?
Not every odd pixel is "dead." Display panels can suffer from three distinct types of single-pixel defects, and knowing which one you have changes everything from whether it is fixable to whether your warranty will cover it.
Dead Pixel
Usually appears completely black on every background. The transistor that powers this pixel has failed, so no light passes through. This is a permanent hardware failure and software cannot revive it.
Stuck Pixel
Usually red, green, or blue. The pixel is receiving power but one or more sub-pixels are frozen open. The good news: rapid color cycling can sometimes unstick them. Try our Dead Pixel Fixer.
Hot Pixel
Shows up as pure white and is usually only visible on a totally dark screen. Unlike a dead pixel, a hot pixel is receiving power and glowing. These often fade as the display warms up or after a few hours of use.
How to Identify Each Type of Pixel Defect
Knowing what you're looking at helps you decide whether it's fixable or a warranty issue. Here's how to visually identify each type during testing:
Shows up as a tiny dark dot on every color - white, red, green, blue, all of them. If a dot stays dark no matter what background you use, it's dead. Not fixable with software.
Appears as a bright colored dot (red, green, or blue) that stays the same on every screen. Easiest to spot on a black background. May be fixable - try our Dead Pixel Fixer.
Only visible on dark backgrounds - appears as a bright white or colored dot. May come and go as your screen warms up. Check with the black and dark gray test colors above.
Are You Sure It Is a Dead Pixel? (Dirt vs. Defects)
Before you panic or start a warranty claim, rule out the most common impostor: dirt. A tiny speck of dust, a dried water droplet, or even a screen sneeze can look exactly like a dead pixel from normal viewing distance.
The difference is simple to check. Gently wipe the area with a soft microfiber cloth slightly dampened with distilled water or screen cleaner. If the spot disappears, it was never a pixel defect at all. Dead and stuck pixels are inside the panel, under the glass, so no amount of cleaning will remove them. Always clean your screen first before running this test to avoid false alarms.
LCD vs OLED: How Defects Look Different
On LCD monitors, dead pixels appear dark against bright sub-pixel filters are locked. Both types are equally easy to spot using the solid color test above.
On OLED screens (common in phones and high-end monitors), dead pixels are more dramatic - they appear as completely black dots on bright content since each pixel is its own light source. OLED stuck pixels are rarer but can appear as dim or always-on dots. Use the white and bright color screens to check for dead OLED pixels, and the black screen for stuck ones.
Manufacturer Dead Pixel Policies
Different manufacturers have different tolerances for dead pixels:
| Brand | Policy |
|---|---|
| Dell (Premium Panel) | Zero bright-dot defects on select models |
| ASUS | Varies by model - check specific product warranty |
| LG | Typically 5+ defects for exchange (varies by region) |
| Samsung | Varies - usually 3+ for exchange |
| BenQ | Zero pixel defect on select models |
If the manufacturer won't replace your monitor over one dead pixel, check your retailer's return policy instead. Amazon and Best Buy usually accept returns within 30 days for any reason, which can be easier than dealing with warranty claims.
Preventing Dead Pixels
While manufacturing defects can't be prevented, you can reduce the risk of developing stuck pixels:
- • Don't leave static images on screen for extended periods (use a screensaver or auto-sleep)
- • Avoid pressing on or touching your screen - physical pressure can damage pixels
- • Don't expose your monitor to extreme temperatures
- • Handle and transport your monitor carefully