How to Test a Screen for Dead Pixels
How to test a screen for dead pixels
Knowing how to test a screen for dead pixels is useful when you buy a new or used monitor, laptop, TV or phone.
- Clean the screen (see how to clean a screen safely).
- Open the colour test, or the phone test on a mobile.
- Go fullscreen and step through black, white, red, green and blue.
- Scan the screen in sections and check the corners.
- Note the type and position of any dot.
Testing a TV
Open the page in the TV browser, or connect a laptop by HDMI and run the test on the TV in fullscreen.
Testing a used screen before you buy
Also check the backlight bleed test and the resolution to confirm the panel matches the listing.