All Hardware Tests
The complete list of diagnostics available on LaptopTestOnline. Every tool is free, runs in your browser, and needs no download.
Hardware tests
- Screen Test
- Pixel Repair Tool
- Color Gradient Test
- Refresh Rate Test
- Brightness Test
- Battery Health & Test
- Touchscreen Test
- Mouse Test
- Keyboard Test
- Fingerprint Sensor Test
- Microphone Test
- Webcam Test
- Sound Test
- Motion Blur Test
- Screen Resolution Test
- Screen Size Test
- Text Sharpness Test
Testing guides
- Dead Pixel Warranty Policies 2026: Dell, HP, Lenovo, Apple, Samsung
- Laptop Return Window Checklist: Best Buy, Amazon, UK and EU Rights
- How to Test a Used Laptop Before You Pay (eBay, Marketplace, Swappa)
- Dead Pixel Test: Run It Online + Safe Fixes
- Backlight Bleed: How to Test and What's Normal
- Color Banding Test & Easy Fixes (8-bit vs 10-bit)
- Screen Flicker (PWM) Test – Reduce Eye Strain
- 144/165Hz Refresh-Rate Test & Frame Skipping
- Keyboard Test (Online) + Stuck-Key Fixes
- Speaker Test (Left/Right) – Audio Check Online
- Touchscreen Test (Online) – Dead Zones & Multi-Touch
- Webcam & Mic Test (Online) – No Download
- Monitor Color Calibration (No Hardware)
- How to Test a Used Laptop Before Buying: 2026 Checklist
- Dead Pixel vs Stuck Pixel: Differences, Causes, and Repair Odds
- Why Does My Laptop Screen Flicker? 9 Causes and Fixes
- Laptop Battery Health: How to Read mWh, Design Capacity, and Wear %
- 60 Hz vs 120 Hz vs 144 Hz Laptops: Is the Upgrade Worth It?
- Webcam Not Working on Windows 11: 12 Fixes to Try, Fastest First
- Microphone Not Detected: Full Troubleshooting Guide
- Keyboard Ghosting & Key Rollover Explained
- Laptop Speaker Crackling: Causes and Fixes
- Windows Hello Fingerprint Not Working: Complete Fix List
- Best Free Laptop Diagnostic Tools (and What They Miss)
- Best Laptop Brands 2026: Reliability Data
- Fix Laptop Overheating: Complete Guide