SCREEN TEST
A screen test helps you identify defects and verify the quality of your display. Whether you're checking a new monitor, testing a used laptop, or diagnosing screen issues, this guide covers everything you need to know.
WHAT IS A SCREEN TEST?
A screen test is a diagnostic process that examines your display for various issues including:
- Dead pixels — Permanently black dots that don't light up
- Stuck pixels — Colored dots (red, green, or blue) that stay on
- Color uniformity — Inconsistent color across the screen
- Backlight bleeding — Light leaking from edges
- Screen burn-in — Permanent image retention
TYPES OF SCREEN TESTS
Dead Pixel Test
Detect black pixels that indicate hardware failure. Most common screen defect test.
What you'll see: Tiny black dots on white background
RUN TEST →Stuck Pixel Test
Find colored pixels that are stuck on. May be fixable with software or pressure methods.
What you'll see: Red, green, or blue dots on black background
RUN TEST →LCD Test
Comprehensive LCD panel testing. Check for dead pixels, stuck pixels, and color accuracy.
Best for: LCD monitors, laptop screens, tablets
RUN TEST →Color Test
Verify color accuracy and uniformity. Test with pure red, green, blue, white, and black backgrounds.
What you'll check: Color consistency, backlight bleeding
RUN TEST →WHICH TEST SHOULD YOU USE?
New Monitor or Laptop?
Start with the Dead Pixel Test to check for manufacturing defects. Most warranties require 3-5 dead pixels before replacement.
See Colored Dots?
Use the Stuck Pixel Test to identify them. Stuck pixels may be fixable with pixel-flashing software or gentle pressure.
Buying Used Device?
Run all tests: Dead Pixel, Stuck Pixel, and LCD Test to verify screen condition.
Check Color Accuracy?
Use the Color Test to examine color uniformity and backlight bleeding.
FREQUENTLY ASKED QUESTIONS
What is a screen test?
A screen test is a diagnostic process that examines your display for defects including dead pixels, stuck pixels, color issues, and backlight bleeding. It typically involves displaying solid colors (white, black, red, green, blue) to identify abnormal pixels.
How do I test my screen?
1. Open the screen test tool. 2. Clean your screen first. 3. Click through each color (white, black, red, green, blue). 4. Look carefully for spots that don't change color. 5. Note any defects for warranty claims.
How often should I test my screen?
Test new monitors within the return period (usually 14-30 days). For existing screens, test if you notice any display issues or before warranty expires.
What's the difference between screen test and dead pixel test?
"Screen test" is a general term for any display diagnostic. "Dead pixel test" specifically checks for permanently black pixels. A complete screen test includes multiple test types: dead pixel, stuck pixel, color, and contrast tests.
READY TO TEST YOUR SCREEN?
Choose the test that fits your needs from the options above, or start with the most common: Dead Pixel Test.
START DEAD PIXEL TEST →