How to use
- Clean the screen first; dust looks a lot like a dead pixel.
- Start the full-screen sequence. Space, click or the right arrow moves to the next pattern; Esc exits.
- On solid colors, look for dots that stay black, white or a single color.
- For backlight bleed, darken the room and check the edges on the black pattern.
Frequently asked questions
Dead pixel or stuck pixel?
A dead pixel stays black on every color. A stuck pixel stays red, green, blue or white. Stuck pixels can sometimes be revived; dead ones cannot.
How much backlight bleed is normal?
Faint glow in a corner at high brightness is common on IPS panels. Bright patches visible at normal brightness in a lit room are worth a return request.
Why do I see stripes in the gradients?
Visible steps (banding) can come from 6-bit panels, color profiles or reduced color settings in the GPU driver.