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Fast links to every tool and troubleshooting guide on DevicePrep.
Main
Team
The authors behind DevicePrep’s diagnostic tools and troubleshooting guides.
- Adrian Reyes
Microphone & Audio Troubleshooting Lead, DevicePrep
Writes and maintains DevicePrep's microphone troubleshooting guides, covering OS permissions, device routing, Bluetooth mic profiles, and browser-level audio diagnostics across Zoom, Teams, and Google Meet.
- Nikhil Desai
Webcam & Video Diagnostics Lead, DevicePrep
Owns DevicePrep's webcam and camera troubleshooting content—covering driver refresh, privacy toggles, browser camera permissions, and video quality diagnostics across Windows, macOS, and meeting apps.
- Simone Park
Network & Connectivity Diagnostics Lead, DevicePrep
Builds and maintains DevicePrep's network diagnostic tools—Ping Test, Upload Speed Test, and Network Test—and writes the guides that help users fix latency, jitter, packet loss, and bandwidth issues before video calls.
- Kendra Holt
Speaker, Echo & Device Compatibility Lead, DevicePrep
Leads DevicePrep's speaker and echo troubleshooting content and cross-browser device testing—ensuring audio output guides, the Speaker Test, and the Echo Test work reliably across browsers, assistive technologies, and the real-world hardware people bring to calls.
Tools
All-in-one
- Pre-call checklist
Run mic, camera, speakers, and network in one guided flow.
Audio
- Mic test
Test your microphone live, view levels, and record + playback.
- Mic clipping test
Check whether your mic distorts when you get louder.
- Background noise test
Estimate ambient noise and identify common sources.
- Speaker test
Play left/right tones to confirm you can hear clearly.
- Echo test
Test mic + speakers together to spot echo issues.
Browser
- Browser capability test
Verify WebRTC/WebGL support before a call.
- Screen sharing test
Test screen sharing before you present.
- Device check
Quick check that your browser can access key devices.
Display
- Screen test
Check pixels, colors, brightness, and banding.
Input
- Keyboard test
Test keys and check for stuck keys or ghosting.
- Mouse test
Test clicks, scrolling, and pointer accuracy.
Network
- Network test
Test network quality for calls: latency, jitter, stability.
- Upload speed test
Measure upload speed for stable video calls.
- Ping & jitter test
Measure ping and jitter to prevent dropouts.
Video
- Webcam test
Preview video, switch cameras, and check resolution.
- Webcam FPS test
Measure frame rate and detect choppy video.
- Webcam lighting test
Check lighting quality and get quick improvement tips.
- Webcam flicker test
Detect flicker from indoor lighting (50/60 Hz).
Troubleshooting guides
20 guides — newest first.
- Fix Bluetooth Headset Mic Not Working on Windows 11
Windows 11 (Bluetooth headsets)
Make sure Windows is using the headset microphone (hands-free), then fix permissions and app device selection so people can hear you.
- Unblock Camera and Microphone Permissions in Your Browser
Chrome/Edge/Firefox/Safari
Reset camera/microphone blocks in Chrome, Edge, Firefox, or Safari so prompts appear again and your devices work in calls.
- Fix Black Screen from Camera on macOS
macOS
Fix a Mac camera black screen by releasing the camera from other apps, resetting permissions, and validating with a live Webcam Test.
- Fix Camera Not Working in Zoom
Zoom (desktop/web)
Confirm the camera is detected and shows a preview, then fix Zoom video settings, permissions, and “camera busy” conflicts.
- Fix Echo and Feedback in Zoom, Teams, and Meet
Zoom/Teams/Meet
Stop echo fast by switching to headphones, matching devices in your call app, and validating your audio path with quick tests.
- Fix Keyboard Not Working in Your Browser
Browser (Chrome/Edge/Firefox)
Use the DevicePrep Keyboard Test, then fix focus, shortcuts, and accessibility settings so key presses register.
- Fix Microphone Not Working in Google Meet
Google Meet (web)
Fix Google Meet mic issues by confirming the mic signal, selecting the right input, and resetting browser/OS permissions so people can hear you.
- Fix Microphone Not Working on iPhone and iPad
iPhone/iPad (iOS/iPadOS)
Check app mute, allow microphone permissions in iOS, and retest with an online Mic Test.
- Fix Microphone Not Working on macOS
macOS
Allow microphone access, pick the right input, and confirm with the DevicePrep Mic Test on your Mac.
- Fix Microphone Not Working on Windows 11
Windows 11
Confirm Windows and your browser can detect the mic, then enable permissions and pick the correct input so apps hear you on Windows 11.
- Fix Microphone Issues in Zoom
Zoom (macOS/Windows)
Unmute, pick the right mic, reset permissions, and use the online Mic Test to confirm Zoom can hear you.
- Improve Slow Network for Video Calls
Any
Measure ping/jitter and upload speed, then reduce congestion and Wi‑Fi instability for smoother Zoom/Teams/Meet calls.
- Fix No Sound from Speakers on macOS
macOS
Choose the right output, raise volume, and confirm both channels with the DevicePrep Speaker Test.
- Fix Camera Not Working in Microsoft Teams
Microsoft Teams (macOS/Windows/Web)
Use the DevicePrep Webcam Test, then fix permissions, device selection, and camera conflicts so Teams can see you.
- Fix Microphone Issues in Microsoft Teams
Teams (desktop/web)
Select the right mic, allow OS or browser permissions, and verify with the online Mic Test before joining Teams.
- Fix Webcam Not Detected on Windows 11
Windows 11
Turn on camera access, refresh drivers, and test with the DevicePrep Webcam Test and the Camera app.
- Fix Webcam Not Working in Chrome
Chrome (Windows/macOS)
Allow the site, choose the right camera in Chrome settings, and verify with a live Webcam Test so Chrome can show video again.
- Fix Webcam Not Working in Firefox
Firefox (Windows/macOS)
Allow camera access in Firefox, select the right device, and confirm with the DevicePrep Webcam Test.
- Fix Zoom Speaker Audio (Run the Built-in Test)
Zoom
Use the DevicePrep Speaker Test and Zoom's own test to pick the right output and hear the call.
- Fix No Sound on Windows 11 (Speakers or Headphones)
Windows 11
Run the DevicePrep Speaker Test, then fix output selection, Volume mixer routing, and driver issues on Windows 11.