Guided Monitor Test
Guided six-step monitor test. Check for dead pixels, stuck pixels, sub-pixel faults and uneven backlighting, then get a plain summary. Free, no install.
Guided monitor test
Six full-screen checks, about two minutes. Answer what you see after each one and you get a plain summary at the end. Nothing here flashes.
Do you see any dark or coloured specks?
A pixel that is permanently off shows as a dark dot on white.
Do you see any bright dots, or glow at the edges?
Bright dots are stuck pixels. Glow along an edge is backlight bleed.
Do you see any specks that are not red?
A speck here means the red sub-pixel is out at that point.
Do you see any specks that are not green?
Green is the channel the eye is most sensitive to. Look carefully.
Do you see any specks that are not blue?
A speck here means the blue sub-pixel is out at that point.
Is the brightness even across the whole screen?
Patches or a colour cast mean uneven backlighting, not a dead pixel.
No faults found
Nothing showed up across all six fields. That covers dead pixels, stuck pixels, sub-pixel faults and gross uniformity problems. It does not cover response time, colour accuracy or backlight bleed in a dark room.
Possible dead pixel
A dark speck on a white field usually means a pixel that no longer lights. Dead pixels cannot be repaired, but they are often covered by a manufacturer return policy if you find them early.
Run the full dead pixel testPossible stuck pixel or backlight bleed
A bright dot on black is usually a stuck pixel, which can sometimes be freed. Glow spreading in from an edge is backlight bleed instead, which is a panel characteristic rather than a fault.
Try the stuck pixel fixerSub-pixel fault
A speck visible on a solid primary means one sub-pixel is out at that point. Check whether it also appeared on white — if it did, it is the same pixel, not several.
Confirm on the dead pixel testUneven brightness or colour
Patchy grey points to uneven backlighting or panel variance rather than a pixel fault. It is the hardest thing to judge by eye and the easiest to measure with an instrument.
Run the uniformity test