Screen & Dead Pixel Test
Fill your whole screen with solid colours and gradients. Dead pixels, coloured lines, dark patches and backlight bleed are easy to spot this way.
Click, tap or use the arrow keys to change colour. Press Esc to exit.
Found dead pixels, lines or dark patches? We replace laptop screens with panels that fit your model.
Get a Screen Replacement Price on WhatsAppHow to use the Screen & Dead Pixel Test
- Clean your screen first so dust is not mistaken for a dead pixel.
- Press Start test. Your screen fills with one colour.
- Click, tap or press the arrow keys to move through each colour.
- Look for dots or lines that stay a different colour. Press Esc to finish.
Common questions
What is the difference between a dead and a stuck pixel?
A dead pixel stays black on every colour. A stuck pixel stays one colour, often red, green or blue. Stuck pixels sometimes recover on their own; dead pixels usually do not.
What is backlight bleed?
Light leaking around the edges of the screen, easiest to see on the black test in a dark room. A little is normal on many screens; large bright patches can mean a damaged panel.
I can see lines across the screen. Is the screen broken?
Not always. Lines can come from the panel, the display cable or the graphics chip. If the lines also show on an external monitor, the problem is inside the laptop rather than the screen.
