Online Screen Tests
Choose the right screen test for dead pixels, stuck pixels, touch failures, broad color checks, backlight bleed, and OLED burn-in. Compare symptoms, launch the correct workflow, and move into repair, warranty, or monitoring with stronger evidence.
Choose Your Screen Test
Each test is built for a different display problem. Match the symptom you are seeing, open the correct workflow, and use the result to decide whether you should retest, repair, move into damage diagnosis, or document the issue for support.
If the screen looks bruised, shows pressure lines, has unstable touch, changed after water or heat, or seems to be getting worse, stop treating it like a test-first problem and open the damage route instead.
Check black dots, stuck subpixels, hot pixels, and localized display defects with clean browser patterns.
Open if
Open if one point stays black, bright, or a fixed color.
Common symptoms
Use a dark-room screen test to compare edge glow, cloudy patches, IPS glow, and uneven black levels.
Open if
Open if dark scenes look patchy or brighter at the edges.
Common symptoms
Look for image retention, OLED burn-in, and persistent interface marks across neutral test screens.
Open if
Open if a logo, HUD, or UI shape lingers after content changes.
Common symptoms
Run an online touch screen test for touch response, dead zones, missed input, drifting taps, and multi-touch behavior.
Open if
Open if part of the screen ignores touch, drifts, or reacts on its own.
Common symptoms
Launch white, black, gray, red, green, and blue fullscreen patterns before choosing a more specific test.
Open if
Open if you need a fast pattern check before choosing Pixel, Bleed, Burn-In, or damage diagnosis.
Common symptoms
What Are You Seeing?
This page is strongest when it helps you separate similar-looking issues quickly. Use the symptom, not just the device, to decide which workflow to open first.
Specialist Test Directory
These are the full diagnostic pages. Use them when the symptom is clear enough that you want a more focused classification workflow, better interpretation help, and stronger next-step guidance.
Check black dots, stuck subpixels, hot pixels, and localized display defects with clean browser patterns.
Open if
Open if one point stays black, bright, or a fixed color.
Common symptoms
Use a dark-room screen test to compare edge glow, cloudy patches, IPS glow, and uneven black levels.
Open if
Open if dark scenes look patchy or brighter at the edges.
Common symptoms
Look for image retention, OLED burn-in, and persistent interface marks across neutral test screens.
Open if
Open if a logo, HUD, or UI shape lingers after content changes.
Common symptoms
Run an online touch screen test for touch response, dead zones, missed input, drifting taps, and multi-touch behavior.
Open if
Open if part of the screen ignores touch, drifts, or reacts on its own.
Common symptoms
Launch white, black, gray, red, green, and blue fullscreen patterns before choosing a more specific test.
Open if
Open if you need a fast pattern check before choosing Pixel, Bleed, Burn-In, or damage diagnosis.
Common symptoms
Confirmation Vs Limits
Browser-based tests are useful because they make visible issues easier to classify. They are not the same thing as a hardware inspection or a guaranteed warranty outcome.
| Test | Best for | Can help confirm | Usually needs retesting | Cannot prove on its own |
|---|---|---|---|---|
| Pixel Test | Dead, stuck, and hot pixel checks | Whether a point defect stays black, bright, or a fixed color across multiple solid patterns. | Repeat across several colors and after cleaning the panel. | Model-specific warranty eligibility or whether a hardware repair will succeed. |
| Backlight Bleed Test | Separating fixed bleed from IPS glow | Whether bright corners or edge patches stay fixed under a dark-screen setup. | Repeat in a dark room and after a small viewing-angle change. | Whether a manufacturer will consider the uniformity issue out of tolerance. |
| Burn-In Test | Image retention versus likely permanent burn-in | Whether stationary ghosting appears across diagnostic patterns and survives retesting. | Run again after varied content at normal brightness. | Exact panel wear level or guaranteed service coverage. |
| Touch Screen Test | Touch dead zones, edge response, multi-touch, and unstable input | Whether the same area keeps missing touch, swipes break in one path, or the screen starts reacting unpredictably. | Repeat one deliberate pass instead of rapid random swiping. | The exact hardware cause or whether repair is worth it by itself. |
| Screen Color Test | Broad visual inspection and route selection | Which pattern reveals the issue most clearly before you open a narrower workflow. | Recheck the same issue on white, black, gray, and RGB as needed. | The final diagnosis if the issue belongs in Pixel, Bleed, Burn-In, or damage diagnosis. |
Operational Checklist
Use a consistent procedure for cleaner diagnostics, better repeatability, and less wasted time chasing artifacts caused by reflections, dirt, or bad test conditions.
Clean the panel first
Remove dust and smudges so you do not mistake surface debris for a defect.
Disable adaptive display modes
Turn off auto-brightness, night modes, local dimming changes, and other dynamic adjustments before you judge a result.
Use the right environment
Dark rooms are best for bleed checks; pixel and retention checks work best in controlled ambient light without glare.
Inspect at normal viewing distance first
Use close inspection to locate the issue, but decide severity from the distance where you normally use the device.
Compare more than one pattern
A real issue should stay consistent across the patterns that are designed to reveal it.
Watch for angle changes
If the glow shifts dramatically with your viewpoint, it is more likely IPS glow than fixed bleed.
Retest before escalating
Repeat the workflow under the same setup before calling a result permanent or support-ready.
Capture evidence with context
Save one normal-distance image, one close image, and the settings or room conditions that affected the result.
Open the right next route
Move into repair, policy review, or monitoring only after you know which defect class you are likely dealing with.
Interpretation Guide
The test alone is rarely the full answer. The useful part is knowing what the symptom probably means, what people commonly misread, and which next action is actually justified.
Likely meaning
You are likely dealing with a dead, stuck, or hot pixel rather than a broad panel uniformity issue.
Common false positives
Dust, panel texture, and zoomed-in glare are common false positives.
Likely meaning
You may be seeing backlight bleed or IPS glow depending on whether the brightness stays fixed or shifts with angle.
Common false positives
Camera overexposure and reflections make dark-room photos look worse than the screen does in person.
Likely meaning
This is usually image retention or burn-in on OLED panels, and the retest behavior matters more than the first pass alone.
Common false positives
Do not call it permanent burn-in until it survives a controlled retest with little change.
Likely meaning
This is usually a touch-layer problem or a hardware-first symptom rather than a standard display-only test issue.
Common false positives
Do not spend the remaining usable touch window on repeated casual testing if you still need backup or access.
Likely meaning
The symptom may be unclear because the setup, brightness, room lighting, or viewing angle is masking the real issue.
Common false positives
Jumping straight into a warranty claim with weak evidence often slows support down.
Diagnostic Reference
The biggest mistakes on screen defects are usually classification mistakes. These reference notes help you separate similar-looking symptoms before you escalate the problem.
Reference pattern
Single-point defects need multi-color confirmation. A black point, bright point, and fixed-color point do not mean the same thing.
Reference pattern
Fixed bright corners usually indicate bleed. Glow that shifts when you move usually points toward IPS glow instead.
Reference pattern
Retention often fades after varied content. Burn-in stays in the same place with little change after retesting.
Reference pattern
Dust, reflections, and overexposed photos can make a screen look worse than it is. Clean the panel and repeat before escalating.
Device And Panel Caveats
Device type changes what is common, what is misleading, and which test should come first. Use the caveat that matches your screen so you do not apply monitor logic to a phone panel or OLED logic to an IPS laptop.
Evidence Capture Checklist
A support team or seller usually cares less about your first screenshot than whether the issue was repeatable, documented cleanly, and described with usable context.
Save one normal-distance image or video that shows the issue in the same state you noticed it.
Save one closer image that confirms the exact defect location without losing all context.
Record the device model, brightness level, room lighting, and whether adaptive modes were disabled.
Note whether the issue stayed in the same location after a retest.
Collect model, timing, and seller details before you escalate the issue to support.
What To Do Next
The strongest next step depends on whether the issue was stable, useful, and actually matched the test you ran. Choose the path that fits the result instead of escalating everything the same way.
Use this when the result was unclear, angle-dependent, or only visible in a weak first-pass setup.
Review the test setupUse this when the issue looks hardware-first: bruising, pressure lines, touch instability, liquid history, or a screen that seems to be getting worse.
Open damage diagnosisTry repair only after the issue type is reasonably clear and the repair route actually fits the problem.
Browse repair workflowsUse this when the issue is stable, practical, and likely heading toward return or warranty discussion after diagnosis is already clear.
Document evidenceFAQ
Detailed answers for workflow selection, evidence quality, and diagnostic reliability.
Reviewed and maintained by Jacob DymondLast reviewed March 28, 2026
Founder, ScreenDetect
ScreenDetect maintains this page as the entry point for choosing the right browser-based screen test, interpreting what the symptom likely means, and building stronger evidence before you move into repair, return, or warranty decisions.