Expert guides, tutorials, and best practices for testing your hardware. Learn how to identify issues and ensure quality.
Browse our complete collection of hardware testing guides and tutorials
Check if your gaming keyboard truly runs at 1000Hz, 500Hz, or 125Hz with our free online polling rate tester and real-time Peak Hz dashboard.
Is one side of your headphones louder than the other? Use our Audio Balance Test to diagnose uneven sound and fix L/R balance in Windows.
Does your audio sound flat? Use our stereo vs mono test to see if you are stuck in mono and learn how to fix it on Windows and Bluetooth headsets.
Check if your headphones are reversed or stuck in mono with our free left and right audio test and quick fixes for channel issues.
Mouse wheel jumping up/down or stuttering? Use our free Mouse Scroll Test to confirm the issue and try these fast fixes.
Left or right click not working? Use our free Mouse Button Test, then apply these quick fixes before replacing your mouse.
Single clicks turning into double clicks? Use our free Mouse Test counter to spot switch bounce and decide if you should repair or replace.
Keyboard feels laggy? Use our Keyboard Test to check responsiveness and learn whether 1000Hz vs 8000Hz actually matters.
Mechanical vs membrane keyboards: see which is right for you and test your current board with our free Keyboard Test.
Deep clean your mechanical keyboard safely, then verify every key with our free Keyboard Test checklist.
Laptop keyboard not typing? Use our Keyboard Test to diagnose, then fix drivers, ribbon cables, or debris before replacing hardware.
Command vs Control vs Option confusing? Test your keyboard online and remap keys correctly for Mac or Windows.
Press a key and nothing happens? Use our keyboard test to check ghosting/rollover and learn when you need true NKRO for gaming.
Spacebar unresponsive, stuck, or loose? Diagnose stabilizers, software settings, and hardware fixes before replacing your keyboard.
Keyboard double typing or chattering? Use our free Keyboard Test to confirm the issue and apply five proven fixes before replacing your board.
Found a bright dot on screen? Use our free Screen Test to locate stuck pixels, try safe fixes, and know when to claim warranty.
Corners glowing or bright patches? Use our Screen Test to tell IPS glow from backlight bleed and decide if you should RMA.
Black dots or bright dots? Use our Screen Test to spot dead vs stuck pixels, pick the right fix, or decide when to RMA.
New monitor? Run this QC checklist with our Screen Test to find dead pixels, bleed, and defects before your return window closes.
Everything you need to know about OLED screen retention and burn-in. Learn prevention strategies, testing methods, and when to worry.
Is upgrading from 144Hz to 240Hz worth it? We break down the real-world differences, who benefits most, and whether your eyes can actually tell.
Learn how to calibrate your monitor for accurate colors. From basic free methods to professional calibration, get the colors right.
Complete guide to the best software and hardware for testing monitors. From free online tools to professional equipment—find the right solution.
Complete guide to buying a gaming monitor. Learn about refresh rates, response times, panel types, and features that actually matter for gaming.
Don't get stuck with a defective monitor. Complete guide to testing your new display within the return window—ensure you catch all issues in time.
Learn how to tell if a pixel is dead or stuck with a step-by-step screen test using solid colors, motion checks, and quick verification tricks.
Which methods can revive stuck pixels, why true dead pixels rarely recover, and how to fix safely without damaging your panel.
Why one dead pixel is often “acceptable” under ISO 13406-2, how brands differ, and how to use retailer return windows to your advantage.
Learn how to tell dead/stuck pixels from OLED burn-in, how to test both, and what you can and cannot fix or prevent.
A rapid but thorough checklist to catch dead pixels, backlight bleed, and physical damage before buying second-hand.
Mobile pixels are tiny; here’s how to test phones with a browser, Android secret codes, and practical tricks before the return window closes.
High PPI hides defects. Learn the pixel density math and practical tricks to reveal “invisible” pixels on 4K and Retina screens.
Understand TFT transistors, sub-pixels, failure modes, and why some pixels are fixable (stuck) while dead ones aren’t.
Flashing tools can trigger photosensitive epilepsy. Use fixers safely, protect sensitive users, and understand what is safe for your monitor.
Use our free testing tools to check your monitor, keyboard, mouse, and more.
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