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Hardware test guides
Practical, step-by-step articles for every test on this site: how to run it, how to read the result and what to do when something is wrong.
How to test your microphone online
Learn how to test your microphone online on Windows, Mac, iPhone and Android, read the level meter, and fix a mic that is silent, quiet or distorted.
7 min readRead guideHow to test your webcam online
Check that your webcam works, see its resolution and frame rate, improve lighting, and fix a black screen or blurry picture before your next video call.
7 min readRead guideHow to test your speakers and headphones
Test your speakers and headphones for left and right channels, volume, distortion and no-sound problems, and learn how to fix audio that is missing or crackling.
6 min readRead guideHow to test your keyboard for dead or sticky keys
Test every key on your keyboard online, find dead keys and chattering switches, check for ghosting, and clean or fix a keyboard that types double letters.
7 min readRead guideHow to test your mouse and fix double-click problems
Test every mouse button and the scroll wheel online, find a double-click or drifting cursor problem, and learn what to clean, change or replace to fix it.
6 min readRead guideHow to test a game controller and check stick drift
Test every button, trigger and stick on a game controller in your browser, check for stick drift, and fix a gamepad that is not detected or lags.
7 min readRead guideHow to test your touch screen for dead zones
Test your phone, tablet or laptop touch screen for dead zones, ghost touches and lag, and learn what to try when a touch screen is slow or unresponsive.
6 min readRead guideHow to test multi-touch on your screen
Find out how many fingers your screen can track, test pinch and zoom, and fix multi-touch gestures that drop or misfire on a phone, tablet or laptop.
5 min readRead guideHow to test your phone vibration motor
Test your phone vibration motor with preset and custom patterns, find out why it is not vibrating, and fix weak or missing haptic feedback on Android.
5 min readRead guideHow to test your phone sensors
Test your phone gyroscope and accelerometer online, see live orientation and motion data, and fix auto-rotate, compass or motion sensor problems.
6 min readRead guideHow to check your screen for dead pixels
Check a monitor, laptop or phone screen for dead, stuck and hot pixels with a fullscreen colour test, and learn what your warranty and options are.
7 min readRead guideHow to fix a stuck pixel
Learn how to fix a stuck pixel with a flashing colour window, a gentle pressure method and a power cycle, and when a stuck pixel cannot be repaired.
6 min readRead guideHow to use an on-screen ruler in real inches and centimetres
Calibrate an online screen ruler with a bank card so it shows real inches and centimetres, and measure small objects accurately on your phone or monitor.
5 min readRead guideHow to record your voice online and save it as MP3
Record your voice in the browser, save it as an MP3 on your device, choose the right quality, and get clean audio for lectures, interviews and voice notes.
7 min readRead guide