Device troubleshooting guides
Dead keys, silent mics, unresponsive touch — each guide starts from the symptom, narrows it by operating system, then hands you a live browser check to confirm the hardware.
Sound, mic, and audio output
All Audio tests- Microphone not working — fix Windows, Mac, iPhone, and call apps Mic not working on Windows, Mac or iPhone? Sort out permissions, pick the right input device, fix Teams, Zoom and Meet, then check the level actually moves.
- Speaker not working — fix laptop, iPhone, and TV audio output No sound on computer or iPhone, or AirPods connected but no sound? Fix output routing, mute, and Bluetooth endpoints, then check left and right.
- Headphone jack not working — fix one-sided audio and silent earbuds Headphone jack silent or one AirPod dead? Clear lint, reseat the plug, fix Windows and Mac balance, then reset a charged left AirPod that still has no sound.
Camera and video
All Camera testsKeyboard, mouse, and touch
All Input tests- Keyboard not working — how to fix laptop, wireless, and brand keyboards Laptop or wireless keyboard not working? Fix Windows, Mac, ChromeOS and iPad settings, rule out drivers and batteries, then check every key before replacing it.
- Mouse not working — fix wireless, laptop, Logitech, and Magic Mouse Wireless or laptop mouse not working? Fix batteries, pairing, touchpad toggles and Windows or Mac settings, then check every button before buying a new one.
- Touchscreen not working — fix dead zones, ghost touches, and unresponsive screens Phone screen unresponsive to touch or ghosting on iPhone and Android? Force restart, rule out protectors, then map dead zones — plus Windows laptops.
- How to fix stick drift — PS5, PS4, Xbox, and Switch controllers How to fix stick drift on PS5, PS4, Xbox and Switch — rule out deadzone and firmware, clean carefully, then choose warranty, repair or Hall-effect sticks.
Power and battery
All System testsWhich guide will fix my device?
Start from the symptom — silent output, dead keys, a black camera preview — not from the product name on the chassis. Every device troubleshooting guide here follows the same shape: narrow the cause by operating system, note brand quirks that often look like hardware failure, then hand you a live browser check so you can confirm what actually changed.
How to use these guides
Hardware problems and software settings look identical from the outside. A keyboard that types nothing might be a stuck Fn lock, a disabled filter key, a Bluetooth pairing glitch, or a failed membrane — and the same pattern shows up across microphones, mice, speakers, webcams, and touchscreens. Jumping straight to a repair shop wastes time when the OS privacy toggle or a driver conflict was the real cause.
The honest answer to "why is my device not working" is usually a setting rather than a fault. So every guide follows the same triage: start with what you see, narrow it by operating system, check the quirks common to popular brands, then verify the result with one of our on-device tools. Nothing in those tools leaves your browser — no uploads, no accounts — so you can safely press every key or speak into the mic while you diagnose.