02PIXEL INSPECTION / 9 COLOURS

Online Dead Pixel Test

Cycle through nine exact solid colours in fullscreen. A faulty pixel is easier to see when one of its red, green or blue subpixels cannot match the surrounding field.

Browser-generated pattern · Not a laboratory measurement

PROTOCOL / 01—04

How to use this test

01
Clean the screen gently and let it reach its normal operating temperature.
02
Set browser zoom to 100% and use the brightness and picture mode you normally use.
03
Start fullscreen mode. Use arrow keys, Space, click or touch to change patterns.
04
Observe from your normal position first, then move closer only to inspect a detail.

OBSERVE

What to look for

Black points on white, red, green or blue fields
Bright points that remain visible on black
Pixels whose colour does not change with the rest of the panel

INTERPRET

How to read the result

A permanently dark pixel may be dead; a coloured pixel may have a stuck subpixel. First clean the surface carefully and repeat the check at normal viewing distance.

LIMITS

Limits of a browser test

Dust, reflections, scaling and protective films can resemble pixel defects. Warranty definitions and acceptable pixel counts vary by manufacturer.

FAQ

Frequently asked questions

01What is the difference between a dead and stuck pixel?

A dead pixel generally stays dark. A stuck subpixel often remains red, green, blue or bright against several backgrounds.

02Should I test at maximum brightness?

Start at your normal brightness, then repeat at a higher setting if needed. Avoid leaving bright static colours on OLED panels longer than necessary.

Online Dead Pixel Test

How to use this test

What to look for

How to read the result

Limits of a browser test

Frequently asked questions

Continue checking

Black screen

Grayscale

Color banding