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 Scanner Test
- Microphone Test
- Webcam Test
- Sound Test
- Motion Blur Test
- Screen Resolution Test
- Screen Size Test
- Text Sharpness Test
- Typing Speed Test
- WiFi Speed Test
Testing guides
- How to Check a Screen for Dead Pixels (Laptop, Monitor, Phone)
- Laptop Won't Turn On? 11 Checks Before You Pay for a Repair
- Laptop Keyboard Not Working? How to Find the Cause and Fix It
- Lines on Laptop Screen: What Causes Them and How to Fix Them
- Laptop Turns On but Screen Is Black: What to Check First
- Why Is My Laptop So Slow? Find the Bottleneck Before You Upgrade
- USB-C Port Not Working on a Laptop? Charging, Video and Data Fixes
- How to Test a Laptop Fingerprint Scanner Online
- Free Laptop Analyzer: Test Every Part Online
- Laptop Plugged In but Not Charging? 12 Fixes That Work
- Why Is My Laptop Battery Draining So Fast? 10 Fixes
- Why Is My Laptop Fan So Loud? Causes and Fixes
- Best Budget Laptops Under $600 in 2026 (Tested Buying Guide)
- Dead Pixel Warranty Policies 2026: Dell, HP, Lenovo, Apple, Samsung
- Laptop Return Window Checklist: Best Buy, Amazon, UK and EU Rights
- Backlight Bleed: How to Test and What's Normal
- Screen Flicker (PWM) Test – Reduce Eye Strain
- 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