Thrips in Your Monitor: How to Fix It
Tiny specks inside your LCD that won't wipe off are likely thrips (thunderflies). Learn why thrips get into monitors and how to remove them.
Read articleFree OLED burn-in check and monitor test—no install, no sign-up. Spot burn-in, dead pixels, and uniformity issues on OLED, LCD, IPS, and mobile. Your data stays on your device.
Most users start here
Start with Auto Test below, or pick a color for full-screen testing
Color patterns are designed to test your display safely—no stress or damage to pixels. Used by thousands to check warranty claims.
No downloads or sign-up. Run the test in your browser with full-screen support. One click to start.
OLED TVs, gaming monitors, laptops, tablets, and smartphones (iOS & Android). One tool, any screen.

This Free online OLED Burn-in Test uses full-screen color patterns and grayscale steps so you can spot burn-in, dead/stuck pixels, and uneven brightness in seconds. The image below shows what a typical test view looks like.
All Tools
19 free, in-browser tools — from dead pixels and backlight bleed to refresh rate, ghosting, and color accuracy. No download, works on any device.
Find dead, stuck & bright pixels
Detect bleed & IPS glow
Real-time Hz & FPS check
UFO motion & response time
Check saturation & gamut
Spot banding & color depth
White balance & tint check
Contrast ratio & black level
Live display info & pixel grid
“Burn-in is the permanent discoloration of a display caused by uneven usage of pixels. Our MONITOR TEST tool helps you identify these issues early.”
Welcome to the most advanced free online tool for checking display health—results in about 30 seconds. Whether you just bought a new OLED TV or want to verify a used monitor, our OLED Burn-in Test detects burn-in, dead pixels, and uniformity issues with no sign-up.
Modern displays, especially OLEDs (Organic Light Emitting Diodes), are susceptible to a phenomenon known as burn-in. This happens when static elements like TV channel logos, game HUDs, or taskbars are displayed for extended periods. The organic compounds in the pixels degrade unevenly, leaving a "ghost" image behind.
Using our tool is simple and effective. Follow these steps to perform a complete OLED Burn-in Check:
Not all "ghosting" is permanent burn-in. Temporary image retention is common on IPS and some OLED panels and usually fades after a few minutes of watching varied content. If the image persists after running our color cycle or a "pixel refresher", it might be permanent burn-in.
While our tool is named for OLEDs, it is equally effective for all display types:
Prone to permanent burn-in. Check for logo shadows and uneven color wear.
Prone to stuck pixels and backlight bleeding. Check using the Black pattern.
Regularly using a MONITOR TEST tool can help you claim warranty service before your coverage expires. Manufacturers often have specific policies regarding dead pixels and burn-in, so having photographic proof using our tool can be vital.
Tiny specks inside your LCD that won't wipe off are likely thrips (thunderflies). Learn why thrips get into monitors and how to remove them.
Read articleBug inside your laptop screen? Laptops are harder to open than monitors — here's how to safely get a live or dead bug out of a laptop display.
Read articleSpotted a bug on your monitor? Learn how to safely get a live insect out, remove a dead bug, tell it apart from a stuck pixel, and keep bugs out for good.
Read articleMonitor flickering, flashing, or blinking on and off? Here are the most common causes — bad cables, refresh rate, drivers, power — and how to fix each one.
Read articleTop Guides
Browse focused English guides for TVs, phones, laptops, handhelds, and used-device checks. Each article links back to the homepage so users can run the burn-in and monitor test immediately.
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Common questions about screen health and testing