Dead Pixel Test
Cycle full-screen solid colors — red, green, blue, white, black — and spot dead or stuck pixels on any monitor, laptop, phone or TV.
927 views
During the test: click or any key → next color · Esc → exit
One Bad Pixel Ruins the View
Start the test and your screen fills with solid colors one by one: red, green, blue, white, black and gray. Click or press any key for the next color; Esc exits. A dead pixel shows as a black dot on every bright color; a stuck pixel shines in one color (often red or green) on the colors where it should be off.
Check the whole surface at each color — corners and edges included — and clean the screen first, since a dust speck fakes a dead pixel perfectly. Testing before the return window closes on a new monitor is the classic use; manufacturers' pixel policies typically tolerate a few defects, so counting them precisely matters.
Frequently Asked Questions
Dead versus stuck — what is the difference?
A dead pixel receives no power and stays black on every color. A stuck pixel is locked on: it glows in one channel (red, green or blue) where it should be dark. Stuck ones sometimes recover; dead ones do not.
Can a stuck pixel be fixed?
Sometimes. Rapid color-cycling over the spot for some minutes (or gentle massage with a soft cloth on LCDs — at your own risk) revives some stuck pixels. Dead pixels are hardware and cannot be revived.
How many dead pixels justify a warranty return?
Each manufacturer publishes a pixel policy (often ISO 9241-307 classes) — commonly a handful of defects are tolerated before replacement. Count what you find here and check your vendor's policy.
Similar Tools
Report a Problem
Dead Pixel Test