Click, Space or → for the next color · ← for the previous · Esc to exit Space ← → Esc
How to test
- Clean your screen and set the brightness to a normal level.
- Click Start test. The screen shows a solid color in full screen.
- Look at the whole screen. Every pixel must show the same color.
- Click or press Space to go to the next color. Test all colors.
- Press Esc to exit the test.
What you can find
Dead pixel
A pixel that gets no power. It stays black on every color. You see it best on the white screen.
Stuck pixel
A pixel that is stuck on one color, often red, green or blue. You see it best on the black screen and on the opposite colors.
Hot pixel
A pixel that is always white. You see it best on the black screen.
Backlight bleed
Bright areas at the edges of an LCD. You see it best on the black screen in a dark room.
How to fix a stuck pixel
A dead pixel is a hardware defect. You cannot fix it. A stuck pixel can come back. Run the test colors for 10 to 20 minutes or use a pixel fixer video. Check the warranty of your display. Many makers replace a display with a set number of defective pixels.
