Dead Pixel
Display diagnostics render directly in-browser, so you can inspect real monitor behavior without installing anything.
Dead Pixel Test Patterns: Solid Colors, Stuck Pixels, Dead Pixels, And Full-Screen Panel Inspection
Run full-screen solid color panels to find stuck pixels, dead pixels, and uneven display defects.
What this test checks
- Full-screen visual inspection
- Panel uniformity or color behavior
- Brightness and contrast visibility
- Scan The Panel Slowly
How to read the result
Dead Pixel is primarily a visual inspection tool. Use full-screen mode, normal viewing distance, and a clean panel surface; persistent bands, tint shifts, glow, or missing pixels are more meaningful when they repeat across colors or brightness levels.
Choose A High-Contrast Pixel Color
Start with black, white, red, green, blue, cyan, magenta, yellow, and custom colors. Different solid backgrounds reveal different stuck pixels, dead pixels, subpixel failures, and dust-like defects.
Open The Pattern In Full Screen
Full-screen mode removes browser chrome and fills the display edge to edge. A dead pixel is easier to spot when the entire monitor shows one uninterrupted color field.
Scan The Panel Slowly
Move your eyes across corners, center zones, and panel edges. Bright stuck subpixels are visible on black, while dark dead pixels are easier to find on white and saturated colors.
Repeat With Several Colors
One color is not enough for a reliable dead pixel check. Multiple color panels help separate real pixel defects from reflections, fingerprints, compression artifacts, or browser scaling effects.
Related I/O Checkup Tools
What does Dead Pixel measure?
Run full-screen solid color panels to find stuck pixels, dead pixels, and uneven display defects.
Do I need to install anything for Dead Pixel?
No. Dead Pixel runs directly in a modern browser. Some checks may ask for permission when they need camera, microphone, gamepad, pointer lock, touch, or audio output access.
Are results uploaded?
The test runs in your browser and uses local input events or browser hardware APIs for the visible diagnostics.
Why should I run related tests too?
Related tools help separate hardware issues from browser timing, display behavior, input device settings, or permission problems, which makes the final diagnosis more useful.
Detailed Testing Guide
Panel symptom
Dead pixel testing is for fixed dots, stuck subpixels, and dust-like marks that appear on clean solid colors.
Start with a baseline run before changing device settings. Record any repeated symptom so the next comparison is useful.
Visual evidence
The important evidence is whether a dot stays in the same physical location across red, green, blue, black, white, and other full-screen panels.
Watch Full-screen visual inspection, Panel uniformity or color behavior, Brightness and contrast visibility, Scan The Panel Slowly. These observations come from the browser; they do not reveal hidden firmware or factory calibration data.
Viewing method
Clean the screen, enter full screen, and scan slowly from edge to edge.
Keep the test conditions stable. Changing browser, cable, port, lighting, surface, volume, grip, or selected device all at once makes the result harder to trust.
Result reading
Dust, reflections, and browser margins can masquerade as defects.
A repeated pattern matters more than a single spike. When something looks wrong, confirm it with another pass and compare a related tool before deciding the device itself is defective.
Limits and next checks
Use uniformity, color, and black-level tests if the issue is larger than a single pixel.
For a closer comparison, try Dead Pixel Test, Backlight Bleed Test, Screen Uniformity Test, Refresh Rate Test. Keep the same device and connection while you investigate the next symptom.