The repair library.
Browse 32 practical repair and troubleshooting guides, then retest your device with a free diagnostic tool.
Microphone Not Working? How to Fix It
Check microphone privacy permissions, select the correct input, restart apps that reserve the mic, test with a second app, and check OS audio input settings.
OPEN GUIDE ↗REPAIR / GUIDEWebcam Not Working? Troubleshooting Guide
Confirm that the browser has camera access, close other video apps, select the correct camera, remove any privacy shutter, then inspect operating-system camera permissions.
OPEN GUIDE ↗REPAIR / GUIDESpeakers Not Working? Fix Missing Sound
Check volume, mute controls and output selection. Disconnect Bluetooth audio devices and inspect cable connections. Test another app before changing system settings.
OPEN GUIDE ↗REPAIR / GUIDEOne Headphone Side Not Working?
Try another audio source, inspect the cable or pairing, clean connectors safely, disable unintended mono audio settings and check left/right balance.
OPEN GUIDE ↗REPAIR / GUIDEKeyboard Keys Not Working?
Check for sticky or obstructed keys, reconnect a wired keyboard, verify battery power on wireless devices and disable accessibility settings that alter key behavior.
OPEN GUIDE ↗REPAIR / GUIDEMouse Double Clicking Unexpectedly?
Check operating-system double-click speed, clean the mouse safely, try another USB port or battery and test the mouse on another device.
OPEN GUIDE ↗REPAIR / GUIDEDead Pixel or Stuck Pixel? How to Check
Inspect a clean screen using black, white, red, green and blue full-screen colors. A consistently dark pixel differs from a pixel stuck on one color.
OPEN GUIDE ↗REPAIR / GUIDEScreen Flickering? What to Check
Check display cable seating, graphics settings, refresh-rate configuration and whether flicker occurs outside the browser. Try an external monitor when available.
OPEN GUIDE ↗REPAIR / GUIDETouchscreen Not Responding?
Clean and dry the screen, remove problematic screen protectors, restart the device and verify the issue across multiple apps.
OPEN GUIDE ↗REPAIR / GUIDEWi-Fi Connected but No Internet?
Check whether another website loads, inspect the router connection, compare cellular and Wi-Fi networks and restart networking equipment if you control it.
OPEN GUIDE ↗REPAIR / GUIDEHow to Allow Camera and Microphone Permissions
Open your browser site-permission controls, allow access for this HTTPS origin, then reload and start the relevant test again.
OPEN GUIDE ↗REPAIR / GUIDEBrowser Location Not Working?
Enable device location services, allow this site to request location, ensure you have a usable signal and try outdoors if satellite reception is weak.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Laptop Microphone That Is Not Detected
The input list is empty or the built-in microphone cannot be selected.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Microphone That Sounds Too Quiet
Your microphone is detected, but recordings are too soft.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Webcam Showing a Black Screen
Camera access appears allowed, but the preview stays black.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Blurry Webcam Image
A camera preview works but looks soft, out of focus or unusually low resolution.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Bluetooth Headphones Connected but No Sound
Your headset reports connected, yet audio still plays through another device or is silent.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Audio Playing Through Only One Speaker
You hear one channel but the other appears silent.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Speaker or Headphone Crackling
Audio contains crackles, pops or distortion.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Keyboard Input Lag on a Laptop or PC
Typed letters appear late or multiple keys seem to lag.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Missing Keys When Pressing Several Keys
Some key combinations fail when several keys are held together.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Mouse Scroll Wheel That Stops Working
Pages do not scroll or scroll unexpectedly.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Mouse Cursor That Keeps Jumping
The pointer jumps or moves unevenly during normal use.
OPEN GUIDE ↗REPAIR / GUIDEHow to Check and Deal With Dead Pixels on a Monitor
A tiny point remains black or colored across images.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Color Banding on a Monitor
Smooth gradients show sudden visible stripes or uneven transitions.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Touchscreen Registering Ghost Touches
The screen registers touches you did not make or skips some of your fingers.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix an Inaccurate Phone Location
A map or website places the phone far from its actual location.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix Clipboard Copy and Paste Not Working in a Browser
Copy or paste fails on a website although it works elsewhere.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Webcam With Low Frame Rate
Video looks choppy or freezes intermittently.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Game Controller Not Detected in the Browser
A connected gamepad produces no readings in the tester.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Website That Cannot Detect Your Camera
Your camera works in apps but certain websites cannot request it.
OPEN GUIDE ↗REPAIR / GUIDEHow to Fix a Laptop Touchpad That Stops Working
The laptop touchpad does not respond or clicks fail.
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