No saved record. Nothing is inferred.
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Dead Pixel Test: Full-Screen Solid Colors
Check your screen on black, white, red, green, and blue backgrounds. Learn what to look for and compare suspicious spots on the same color.
YOUR TEST SPACEThis view only
Not started — no observations yet
Use controls to change color. Esc or Exit to leave. Controls cover part of the screen.
Manually inspect the same area on all five colors. No automatic detection or repair.
Browser observations · 0
No events recorded. This is not a pass result.
No saved record. Nothing is inferred.
Leaving this view or switching language clears this session. Stop preserves saved records; Clear & end removes them and ends activity.
Select a solid color, enter full-screen mode if available, and inspect the display slowly for dots that look different from the surrounding background. Repeat with black, white, red, green, and blue, then revisit any suspicious spot on the same color. This dead pixel test relies on your visual observations; it does not automatically detect or repair pixels.
How to check your screen
Select a color in the test area, then choose “Full screen / Exit.” Scan from the upper-left corner across each row of the display, working down to the bottom edge. Use “Next color” or select another color directly. To leave full-screen mode, use “Full screen / Exit” again or press Esc.
Before comparing results, use the display’s normal resolution and temporarily turn off night-light settings and color filters. Choose a comfortable brightness and keep it unchanged between rounds. For surface cleaning, follow the display manufacturer’s instructions before testing again.
Record what you actually see: the background color, the dot’s appearance, its approximate location, and whether it stays visible. For example: “White background: one dark dot near the upper-right corner; still visible on a second look.” Treat that as an observation rather than a confirmed diagnosis.
Which colors to inspect
Inspect all five backgrounds: black, white, red, green, and blue. On white, look for dark dots. On black, look for bright or colored dots. On red, green, and blue, look for small points that differ from the surrounding color, and check the same location across all five backgrounds.
A dead pixel does not light up and is easiest to spot against white. [Dead Pixel Test Online]
A pixel stuck on may appear as a persistent colored point against black. [Dead Pixel Test Online]
These appearances are clues for a dead or stuck pixel test, rather than enough evidence to identify the physical cause. Describe a broad patch, line, or changing mark as you see it instead of labeling every irregularity a dead pixel.
If full-screen mode is unavailable
Continue inspecting the visible solid-color area and maximize the browser window to give yourself more room. Only the area displaying the test color is covered; browser bars, system bars, and anything outside that area remain uninspected.
The color and exit controls also cover part of the test area, including in full-screen mode. Do not count an area behind those controls as checked. If a suspicious location falls outside the visible color area, try another browser or a supported full-screen view before recording that location as inspected.
Record the limitation alongside your result—for example, “No unusual dots noticed in the visible white area; top edge hidden by browser controls.” This makes a partial inspection useful without presenting it as a check of the entire display.
Can this test fix a pixel?
No. DeviceRecheck provides solid backgrounds for visual inspection, with no automatic pixel detection or repair. Changing colors is an inspection step, not a repair procedure. Do not press, rub, or disassemble the screen as part of this test.
For a useful retest, save your first observation, record one adjustment, and return to the same location on the same background. For example: “Before cleaning: dark speck near the lower-left corner on white. After cleaning according to the manufacturer’s instructions: speck no longer visible.” If it remains visible, record that outcome without assuming its cause.
If a point persists, note its location, appearance, and the backgrounds on which you can see it, then provide those details to the seller or manufacturer. Consult the terms for your specific product and purchase before deciding whether to request service or a return. Seeing no suspicious dots means only that you did not notice any in the areas and colors inspected; it does not establish overall display health.