Online diagnostic tool

Screen Testing & Repair Guides

Practical explanations for dead pixels, screen damage, warranties, touch problems and display care.

Direct answer

What is DeadPixelTest.net?

DeadPixelTest.net is a free browser-based diagnostics suite for screens, cameras, audio, keyboards, mice, touchscreens, sensors and connected devices. Most tests run locally without requiring installation.

✓ No installation✓ Works in compatible browsers✓ Privacy-focused testing

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Can Dead Pixels, Spots, Black Spots, or Screen Shades Spread? – A Comprehensive Guide

Step-by-step guide to fix dead pixels, unresponsive touch, and screen damage on phones. Learn DIY solutions, repair costs, and when to replace your display.

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Are Dead Pixels Covered Under Warranty?

Complete guide to manufacturer warranty policies for dead pixels. Learn which brands cover screen defects and how to claim repairs.

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Find Invisible Screen Damages with DeadPixelTest.net

Find invisible cracks, shades and other damages on mobile, desktop and all other screens with deadpixeltest.net.

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How To Check Dot On Mobile Screen with Deadpixeltest.net

Explanation of how to inspect screens for defects such as dots, damages, cracks, and shades when they have been dropped or mishandled, or when purchasing a new one

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How to Eepair Mobile Screen Cracks, Test, Analyze, and Check the Screen with Free Online Tools

Repairing Dead Pixels and Replacing Broken Screens: A Comprehensive Guide about how to check, test, analyze, repair and replace the damaged screen.

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Impact of Dead Pixels on User Experience: A Comprehensive Analysis

How the dead pixels impact user experience on the screens and how to find them. Understand how the deadpixels impact on your health and work efficiency.

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Phone Screen Damage Test

Check your damaged phone, iphone, android and all other devices screens for cracks, shades, damages for free with deadpixeltest.net

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Mobile Screen Repair Guide - Fix Dead Pixels, Touch Issues

Step-by-step guide to fix dead pixels, unresponsive touch, and screen damage on phones. Learn DIY solutions, repair costs, and when to replace your display.

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Secret Codes for Testing Mobile Screens

Secret codes to test mobile hardware at the time of sale/purchase, or exchanging mobiles. With these secret codes you can test mobile screens of all companies for deadpix

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What are The Dead Pixels and How to Test Your LCD Screens Imperfections

Understanding what is a dead pixel and how to check the screen quality. How to repair dead pixel or find out dead pixel and how they effect touch screens.

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Dead Pixel TestInspect solid colors for dead, stuck, bright or dark pixels. Touch Screen TestCheck touch coverage, dragging continuity and dead zones. Keyboard TesterTest a full-size keyboard and confirm every key press. Mouse TesterTest buttons, wheel, movement, dragging and double-clicks. Audio TesterCheck speakers, stereo channels, tones and microphone input. Camera & WebcamTest built-in, USB, phone, tablet and compatible TV cameras. Microphone TesterView microphone levels, waveform, recording and playback. Pixel ExerciserExercise a suspected stuck-pixel area with changing colors. Gradient TestInspect gradients, tonal transitions and visible banding. Brightness & ContrastCheck black levels, white saturation and contrast separation. Screen Size TestView viewport, resolution, pixel ratio and display data. Text SharpnessInspect text rendering, browser scaling and clarity. Motion & GhostingObserve motion blur, ghosting and response behavior. Resolution & ScalingCheck screen resolution, CSS pixels and scaling. Device InformationReview screen, browser, hardware and platform information. Browser CapabilityCheck which browser APIs and hardware features are supported. Network TestCheck connection status, latency and estimated download speed. GPS & LocationTest browser geolocation, accuracy, altitude and speed. Sensor TesterTest orientation, motion, acceleration and rotation sensors. Multi-Touch TesterTrack multiple touch points, pinching and rotation gestures.Screen Color ToolsOpen exact full-screen color pages for pixel, uniformity and lighting checks.Response Time TestObserve ghosting, blur and pixel-transition behavior at several speeds.Stylus Drawing TestCheck pen, touch, pressure, tilt and drawing continuity in your browser.