Guides

Short answers to what people ask after a test.

• Keyboard typing double letters: how to confirm chatteringOne press, two letters? Confirm double-typing (chattering) on a single key with the keyboard tester, see how the 30 ms rule decides, and rule out other causes.
• Key rollover and ghosting: test how many keys register at onceHold keys together and see how many your keyboard really reports. A practical way to test key rollover and spot ghosting or blocked combinations.
• Microphone not working in the browser: a permission checklistMic silent in a browser call? Run the mic test, read the message it gives and follow the matching fix: site permission, system setting, device or another app.
• How to check a new monitor for dead pixels and the right refresh rateA ten-minute check for a new monitor or laptop screen: full-screen colors to find bad pixels, what to note down, and a test of the refresh rate it really runs at.

Other tests

• Keyboard TesterEvery key, keys held at once, double-typing
• Mouse TestButtons, wheel, double-click fault, report rate
• Mic TestLevel, recording and playback
• Webcam TestLive picture, size, frames per second, photo
• Speaker Test (Left / Right)Left, right, both, rising tone
• Dead Pixel TestFull-screen black, white, red, green, blue
• Refresh Rate TestScreen Hz and a moving bar
• Gamepad TesterButtons, sticks, triggers, drift, vibration