Compare solid backgrounds
A dark point that stays fixed across white and primary-color backgrounds may be a non-emitting pixel or subpixel. A bright or colored point visible on black may be a continuously illuminated subpixel. Inspect several backgrounds rather than relying on one photograph.
Rule out the surface
Clean the display only as the manufacturer recommends. Dust, reflections and marks on the surface can resemble a pixel defect. View the point from the normal distance and change the background without changing the screen position.
Understand screenshots
A screenshot captures the rendered image, not the physical light emitted by the panel. View it on another display: a panel defect usually will not be present in the captured image. This comparison helps separate a persistent image artifact from a physical display concern; it is not conclusive for every fault.
Keep useful evidence
Record the location, backgrounds and normal brightness. Check the manufacturer’s pixel-defect policy for that model before assuming a replacement is covered. Avoid pressure, heat or unverified flashing “repairs”. The screen tools here use manually selected solid colors and make no repair promise.
Keep both reports in Device Lab →