Dead Pixel Test
Use the full-window color test and inspect each solid screen from different viewing distances.
Dead Pixel Test
After starting, press Escape to exit.
A QUICK WALKTHROUGH
How to use this tool
- Open the test and dim the room if possible.
- Cycle through black, white, red, green, blue, and neutral gray screens.
- Inspect the panel closely, then press Escape or the exit button.
Local display inspection
The workbench changes only this browser page’s background color. No camera, screenshot, upload, or device data is used.
Use several colors
A pixel defect can be visible on one background and hidden on another. Check every color at native display scale where possible.
GOOD TO KNOW
Common questions
Can this repair a dead pixel?
No. It is an inspection aid and cannot repair hardware.
Does a dark spot prove a dead pixel?
No. Dust, panel coating, browser scaling, graphics hardware, or a temporary rendering issue can look similar.
Does it test the whole monitor?
It displays colors across the browser viewport only. Browser chrome, other screens, and pixels outside the viewport are not tested.