Free Laptop Screen Test
Before you start
- Wipe the screen and set brightness to full.
- Check the bottom edge near the hinge for light leaks.
- Tilt the lid and watch for flicker or lines.
Colour screens
Tap a colour to test it fullscreen
Custom colour
Your Screen Info
Detected in your browser
Shortcuts
- F Fullscreen
- → Next screen
- ← Previous
- Esc Exit
On a phone or tablet, tap to go to the next screen.
What is a laptop screen test?
A laptop screen test checks the built-in display of a notebook. Laptop panels are thin and the screen flexes with the lid, so faults can show up near the hinge, along the bottom edge or after the lid has been opened many times.
Use it on a new laptop, when buying a used one, or after a screen repair. The colours show dead and stuck pixels, while the black screen shows light leaking from the bottom bezel.
How to test a laptop screen
1
Plug in the charger
Many laptops dim the screen on battery. Set brightness to full.
2
Start the test
Click the Start button or press F. The first colour fills the laptop screen.
3
Move the lid gently
While a colour is showing, tilt the lid slowly. Lines or flicker that change as it moves can point to a loose display cable.
What to look for on a laptop
Black dot on white
A dead pixel in the laptop panel.
Glow along the bottom edge
Light bleed near the hinge is common on laptops. Small amounts are normal.
Lines or flicker when you move the lid
Often a worn or loose display cable rather than the panel itself.
Yellow patch or pressure marks
Marks from the keyboard or pressure on the lid can leave lighter patches.
Related tests
Monitor Screen Test
Check a new or used monitor
Mobile Screen Test
Check a phone or tablet screen
TV Screen Test
Check a TV in its browser
LCD Screen Test
Bleed, evenness and pixels on LCD
Dead Pixel Test
9 colours to find dead and stuck pixels
Backlight Bleed Test
Spot light leaking at the edges
Refresh Rate Test
Live Hz, FPS and frame time graph
Greyscale Test
Grey ramps and steps for tint and lost shades
Frequently asked questions
Why does my laptop screen look dimmer on battery?
Power saving lowers brightness. Plug in the charger or change the power plan before testing.
Can I test a laptop before buying it used?
Yes. Open this page in the browser, run the colours and check the black screen with the lights off.
Does this test the touch screen?
No. Use the touch screen test for touch laptops.
Will it work on a MacBook or Chromebook?
Yes. It runs in any modern browser on macOS, Windows, ChromeOS and Linux.