All-around check
A complete pass through the basics.
YOUR DISPLAY, UNDER A CLOSER LOOK
Dead pixel test.
Use five solid colors to check a suspicious point, one background at a time.
↗ No installation◉ Visual inspection⌂ Stays on your device
White
RGB 255, 255, 255YOUR TEST PATTERN
Start with white.
Select a color, then give it the whole screen.
← → Switch colorsEsc ExitF Fullscreen
Tap the pattern to show controls. No automatic cycling or flashing.
◎ You inspect the physical screen. Nothing is scanned or uploaded.Go at your own pace ↗
YOUR EYES. YOUR NOTES.
Keep a little record.
Save what you noticed, so you can compare later. One record per test, stored only in this browser.
⌂ Local to this deviceNo automatic result. Choose only what you actually observed.
A MORE FOCUSED LOOK
Something specific on your mind?
Choose a check for what you’re seeing.
Gray screen uniformity
Compare gray screen shades for bands, tint, and uneven areas.
Screen bleed (LCD)
Compare LCD black and near-black fields for edge light.
Screen burn-in
Lingering logos, shapes, or uneven tones.
OLED screen test
Compare gray and color fields on OLED or AMOLED screens.
LCD screen test
Compare familiar colors and gray levels on an LCD.
TAKE A MINUTE. TAKE A CLOSER LOOK.
How to check for dead or stuck pixels
You do the observing.
We provide the patterns.
- 01
Gently remove surface dust using the device maker’s cleaning instructions. Do not press on the panel.
- 02
Inspect white for dark points and black for bright points. View at a comfortable distance.
- 03
Switch through red, green, and blue. Check the same physical spot against every background.
- 04
Repeat after cleaning. If the point persists, record its position and consult the manufacturer’s pixel policy.
BEFORE YOU DRAW A CONCLUSION
Your screen check questions
Can this dead pixel test count pixels automatically?
No. The screen checker shows white, black, red, green, and blue backgrounds for your own inspection. Compare the same physical point across fields; it does not count or classify pixel faults.
Can this tool fix a dead or stuck pixel?
No. It displays static test colors for observation and does not offer flashing repair sequences. Do not press or rub the panel. Use your device maker’s guidance for a persistent point.
Does one visible point qualify for a replacement?
There is no universal answer. Pixel policies differ by manufacturer, model, region, and defect type. Record your observation and check the policy for your exact display instead of treating this test as a warranty verdict.
Does this dead pixel checker detect faults automatically?
No. It displays solid-color backgrounds for your own inspection. It does not locate a point, count pixels, or produce an automatic fault report.
Can I use a dead pixel test on an iPhone, Android phone, or laptop?
Yes, if the device can open this page in a modern browser. Compare the same physical point on white, black, red, green, and blue; browser controls and display filters can affect the view.
What is a hot pixel?
Pixel terminology varies by manufacturer. A bright point may be described as stuck or hot in different support guides, so compare it across backgrounds and check your display maker’s definitions.
Will a stuck pixel fixer repair the point?
ScreenCheckup does not run pixel-fixer flashing software or promise a repair. Check the same point on several colors, avoid pressing the panel, and follow the manufacturer’s model-specific advice.
MAKE SENSE OF WHAT YOU SEE
Put your observation in context.
Compare the clues, then return to the tool to repeat your check.
Instructions source-checked · Dell Display Pixel Guidelines. Manufacturer guidance explains the concepts; it does not certify this tool or your panel.
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