Primary check
60 sec
Pixel Test
Checks for dead, stuck, or unstable pixels across controlled color states.
Use first when a spot, dot, or color fault appears anywhere on the panel.
Screen diagnostics
Find out what's wrong with your screen.
Run browser-based checks for pixel defects, backlight bleed, and OLED retention, then move into the right repair or device research path with evidence instead of guesswork.
Testing tools
Which screen issue are you trying to confirm?
Start with the browser-based check that matches the symptom you can see. Repair, warranty, and device research make sense only after the panel state is clearer.
Dark-room check
45 sec
Backlight Bleed Test
Checks for edge bleed, glow, and pressure hotspots on dark fields.
Use when corner glow or edge haze is only visible against black backgrounds.
OLED retention
90 sec
Burn-In Test
Checks for retention, ghosting, and uneven wear across OLED panels.
Use when static UI elements or old images still appear after they should be gone.
Touch evidence
90 sec
Touch Screen Test
Checks for dead zones, drifting input, and unstable touch on phones and tablets.
Use when taps miss, swipes break in one area, or the screen starts reacting unpredictably.
Pattern launcher
60 sec
Screen Color Test
Opens white, black, gray, and RGB patterns to reveal broad panel issues quickly.
Use when the issue is visible but you still need the cleanest pattern before choosing a narrower test.
Classification
Dead pixel vs stuck pixel: when repair is worth trying.
Stuck pixel
May respond to repair
Colored on contrasting backgrounds
Subpixel channels still react
Run repair only after confirmation
Dead pixel
Hardware issue
Black on every background
No color response during tests
Document for warranty or replacement
Repair path
Run the right screen test before you try a repair.
Open Stuck Pixel Fixer only after testing confirms a colored pixel fault that may still respond. If the panel state is actually dead, stop early and document it for return, warranty, or replacement.
Confirm the defect stays colored instead of black.
Choose a movable precision window or fullscreen repair.
Re-test after each session instead of looping blindly.
Caution
If the defect stays black on every background, software repair is unlikely to help. Move toward warranty, retailer support, or replacement instead.
Workflow
How ScreenDetect helps with returns, warranty claims, and next steps.
01
Run a targeted test
Start with the browser check that matches the symptom or screen type.
Outcome
You isolate where the problem appears and whether it is real.
02
Interpret the signal
Compare how the defect behaves across controlled visual states.
Outcome
You know whether the issue is repairable, worth documenting, or worth monitoring.
03
Take the correct next step
Open damage diagnosis, repair, device research, warranty, or replacement only after the result is clear.
Outcome
Action follows evidence instead of guesswork.
Why ScreenDetect
Why users check ScreenDetect before repair, replacement, or support.
Test
Check whether the problem is real and where it appears.
Interpret
See what the result means before you try to fix anything.
Act
Choose repair, warranty, replacement, or deeper device research.
When to use ScreenDetect
When to use screen tests for new devices, warranty windows, and resale.
Returns and exchanges
First 72 hours
New device check-in
Run full-screen checks while return and exchange windows are still easy to use.
Phones, tablets, laptops, monitors
Coverage window
Final 2–4 weeks
Warranty checkpoint
Revalidate panel condition before support terms expire.
In-warranty displays
Listing and trade-in
Before listing
Resale prep
Document the screen state before resale photos, trade-in, or handoff.
Used devices
Visible symptom
As needed
Issue verification
Classify glow, retention, bleed, or pixel defects as soon as they appear.
LCD, LED, OLED, AMOLED
Hardware-first symptoms
Immediately after the change
Damage triage
Use damage diagnosis when the screen changed after pressure, water, heat, ghost touch, or a visible bruise that does not fit a normal test workflow.
Phones, tablets, laptops
Open damage diagnosisDevice profiles
Explore display profiles, panel types, and deeper guides.
Device profiles turn a defect result into broader display context: how bright the panel should be, what type of screen it uses, and what tradeoffs matter before you compare, buy, or troubleshoot further.
Frequently asked questions
Screen test and repair FAQs.
Practical guidance on choosing the right tool, setting expectations for repair, and documenting issues when escalation is the better path.
Reviewed and maintained by Jacob Dymond
Founder, ScreenDetect
Last reviewed March 22, 2026
ScreenDetect publishes browser-based diagnostics and repair workflows to help users classify visible panel issues, understand what the web can and cannot prove, and move toward the right return, warranty, repair, or research path without overstating certainty.