Cleaning a laptop display
Open the white screen at normal brightness. Dust and fingerprints are easier to see against a bright, even field.
Open white screenexamples
Pick the screen color for the problem you are checking.
Checking for a stuck bright pixel
Use the black screen. A bright stuck pixel usually stands out more clearly when the rest of the panel is dark.
Try black presetTesting color sub-pixels
Cycle red, green and blue. A defect that only appears on one color may point to a sub-pixel issue.
Cycle colorsFinding tiny marks
Enable the pixel grid when a speck is hard to classify. A surface mark will not align with the grid like a pixel defect does.
Use grid mode