A webcam that suddenly stops working is one of the most common — and most frustrating — hardware problems, usually right before a video call. The good news is that the vast majority of cases come down to a handful of fixable causes: permissions, another app holding the camera, a driver issue, or a wrong device selected. This guide walks through each one in order, from the quickest checks to the deeper fixes.
Start Here: Quick Checks
Before anything technical, rule out the obvious. These resolve a surprising share of "webcam not working" cases:
- Physical privacy shutter: Many laptops and external webcams have a sliding cover. Make sure it is open.
- Cable and port: For external webcams, reseat the USB cable and try a different port. A loose or failing port is common.
- Restart: A full restart clears the most camera glitches. Try it before deeper steps.
Step 1: Confirm Whether It's Hardware or Software
The single most useful diagnostic step is isolating the camera in a neutral environment. Open a simple camera test in your browser. If your feed appears there, the webcam hardware and drivers are working — the problem is inside whatever app failed (Zoom, Teams, Discord, etc.). If it does not appear even in the test, the issue is at the system or hardware level.
Step 2: Check Camera Permissions
Permissions are the number one cause of a "not working" camera that is actually fine.
On Windows
Open Settings → Privacy & security → Camera. Make sure camera access is turned on, and that the specific app (or your browser) is allowed. Windows can silently block all camera access with one toggle.
On macOS
Open System Settings → Privacy & Security → Camera and confirm the app you are using is checked. macOS requires per-app approval and will block until granted.
In the Browser
If browser-based apps fail, the site may be blocked from the camera. We cover this in detail in our browser camera permissions guide.
Step 3: Close Apps Holding the Camera
Most cameras can only be used by one application at a time. If Zoom is open, Teams may report "camera not working." Fully quit every app that might be using the webcam — including ones running in the background or system tray — then try again. This is one of the most common causes of a black screen.
Step 4: Update or Reinstall the Driver
On Windows, open Device Manager → Cameras (or Imaging devices). If your camera shows a warning icon, right-click it and choose Update driver. If that fails, uninstall the device and restart — Windows usually reinstalls a working driver automatically. Outdated or corrupted drivers are a frequent culprit after system updates.
Step 5: Select the Right Camera
If you have more than one camera (a laptop's built-in plus an external), apps sometimes default to the wrong one, showing a black feed. Check the video settings inside the app and explicitly choose the correct device.
Tip: After any fix, re-run the camera test to confirm the feed before joining a real call. It takes seconds and saves the awkward "can you see me?" moment.
Still Not Working?
If the camera fails even in an isolated test, after permissions are granted, with all other apps closed, and with an updated driver, the hardware itself may be faulty — especially if it never appears in Device Manager at all. At that point, testing the webcam on a second computer confirms whether it is the device or your system.
Related Reading
If your issue is specifically with browser-based video, see our browser camera permissions guide. To learn the full testing process from scratch, read how to test your webcam online. And if your microphone is also acting up, our microphone testing guide covers that side.
Understanding the Most Common Causes
When a webcam fails, the cause almost always falls into one of five buckets: a permission is blocking access, another application is holding the camera, a driver is outdated or corrupted, the wrong camera device is selected, or — least commonly — the hardware itself has failed. Working through these in order, from the quickest to the deepest, resolves the overwhelming majority of cases without guesswork. The reason this order works is that the most frequent causes are also the fastest to check.
Windows-Specific Troubleshooting
On Windows, the camera privacy settings are the most common silent culprit. A single system toggle under Privacy & security can block every app from the camera at once, and Windows updates have been known to reset these. Beyond permissions, Device Manager is your diagnostic hub: a camera with a warning icon points to a driver problem, while a camera that does not appear at all suggests a deeper connection or hardware issue. Rolling back a recently updated driver can also fix cameras that broke right after an update.
macOS-Specific Troubleshooting
macOS enforces strict per-app camera permissions, and the camera cannot be enabled or disabled manually like a normal device — it activates only when an approved app requests it. If your camera fails on a Mac, the first stop is System Settings → Privacy & Security → Camera, confirming the specific app is checked. A common Mac-specific fix for a frozen camera is to quit all apps that might use it, since macOS will not free a camera still claimed by a background process.
Browser vs Desktop App Failures
It is important to identify whether the failure is browser-wide or app-specific. If your camera works in desktop apps but not in any website, the issue is browser permissions or a system block on the browser. If it works in one website but not another, it is that specific site's permission. And if it works in the browser but not in a desktop app like a video conferencing tool, that app has its own separate permission and device selection to check. Pinpointing the layer saves you from chasing fixes in the wrong place.
Confirming a Hardware Failure
True hardware failure is rarer than people assume, but it does happen. The clearest test is to try the camera on a completely different computer. If it fails everywhere, after permissions and drivers have been ruled out, the device itself is likely faulty. For built-in laptop cameras that never appear in Device Manager even after a driver reinstall, a loose internal connection or failed module is possible — at which point professional repair is the next step. Before concluding hardware failure, though, always exhaust the software causes, since they account for the large majority of problems.
Preventing Future Problems
- Keep drivers current but be ready to roll back if an update breaks the camera.
- Close camera apps fully when done, so they do not hold the device.
- Re-check permissions after major OS updates, which sometimes reset them.
- Do a quick test before important calls rather than discovering a problem live.
🚀 Try the Tool
The fastest way to confirm whether your webcam is working at all is to open it in an isolated test. The Camera Test shows your live feed instantly in the browser — if it appears there, your hardware is fine and the problem is app-specific.