Find pixel defects without installing software.

Cycle through uniform test colors in fullscreen and inspect the panel for dead, stuck, bright, or color-dependent pixels.

Pixel inspection bench

Measuring

Diagnostic result

Complete the visual inspection

Inspect every solid field in fullscreen. 1 of 6 colors have been selected so far.

Refresh rate measuring
1/6 color fields viewed
Manual visual confirmation

Solid colors help reveal stuck, dead, bright, or color-dependent pixels. Clean the panel first and inspect at a comfortable brightness; software cannot repair a physical pixel defect.

Classify the spot before taking action.

Dust and reflections can resemble pixel defects. Inspect every solid field after cleaning the panel with the display off.

Observed signalLikely layerNext check

Black dot on every colorPossibly dead pixel or debris

Clean the panel, retest, and photograph it for the manufacturer if unchanged.

Bright dot on dark fieldsPossibly stuck subpixel

Compare red, green, and blue fields to identify which subpixel remains active.

Line or large blockPanel, cable, or graphics path

Capture a screenshot; if the line is absent in the screenshot, test the cable and display.