Prepare the display
Clean the panel, use its native resolution and normal brightness, and disable color filters before comparing patterns.
Tools
Monitor Screen Test
Run a guided monitor inspection for pixel defects, backlight bleed, gray uniformity and tonal detail. Record your own observations and download a checklist.
Device guidesTest workspace
Use every mode and inspect the entire panel, including corners and edges.
Clean the screen. Use normal brightness and native resolution, then inspect the patterns on the display you are testing.
Reviewed 0 of 4 checks
Step 1 of 4
Pixels
Inspect white, black, red, green and blue. Look for points that stay dark, bright or the wrong color. This is a visual check, not automatic detection.
Pixels. Inspect white, black, red, green and blue. Look for points that stay dark, bright or the wrong color. This is a visual check, not automatic detection.
Pattern 1 of 5Pure Black
Use arrows to change patterns. Move or tap to show controls. Escape exits fullscreen.
Inspect a monitor in a repeatable sequence
Review each check
Cycle through all patterns in a check. Use fullscreen for a clean field, then record whether it looks normal, has a possible issue or was skipped.
Save observations for a recheck
Read the summary, add notes and download your checklist. Use the linked focused tests to investigate a repeatable symptom.
Monitor Screen Test
The summary contains your observations, not a measured pass or fail. Dust, reflections, viewing angle and display settings can resemble hardware defects.
Testing notes
LCD backlight bleed and OLED gray uniformity are different observations; skip checks that do not apply.
Repeat a suspected issue at normal viewing distance and brightness before drawing conclusions.
Photograph visible physical defects with an external camera; a browser screenshot only records rendered content.
Frequently asked questions
Does the inspection automatically detect faulty pixels?
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No. The page displays patterns and records the selections you make. It cannot read the physical state of panel pixels or certify a monitor.
Are my notes uploaded?
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No. Your selections and notes stay in this tab. The downloadable checklist is generated on your device; leaving or resetting the page clears the session.