Last updated 28 August 2026
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Detected versus working
Establish which problem you have, because the fixes are completely different.
- Camera appears in lists but gives a black image — it is detected. See webcam shows a black screen.
- Camera appears nowhere at all — the computer cannot see the device. Continue here.
Press start on the camera test and open the camera source list. If it is empty or shows only virtual cameras, nothing is detected.
External webcams: work through the physical layer
- Try a different USB port. Front panel ports and hubs are a common failure point. Use a port directly on the motherboard at the back of a desktop.
- Avoid hubs, docks and monitor USB ports. Webcams need consistent bandwidth and power, and these often cannot supply it reliably. Plug directly into the computer.
- Try a different cable if the cable is detachable. Cables fail far more often than cameras, particularly at the connector where they flex.
- Try the camera on another computer. This is the single most informative test. It separates a dead camera from a computer problem in seconds.
- Listen and look. Most webcams show an LED on connection and Windows plays a connection sound. Neither happening suggests no power is reaching the device.
USB 3.0 ports interfere with 2.4 GHz wireless. If your webcam works but a wireless mouse or keyboard stutters when it is plugged in, move the webcam to a different port. This is a well-documented interference problem, not a fault in either device.
Windows: check for hidden devices
- Right-click Start and open Device Manager.
- Open the View menu and enable Show hidden devices.
- Expand Cameras, Imaging devices and Universal Serial Bus controllers.
- Look for an entry with a warning triangle, or one named Unknown Device. That is your camera, detected but without a working driver.
- Right-click it, choose Uninstall device, then restart. Windows reinstalls a generic driver on boot that works with almost every webcam.
If nothing appears even with hidden devices shown, and the camera is external, the device is not reaching the computer electrically. That points at the cable, the port or the camera itself.
Built-in laptop cameras
An internal camera that has vanished from Device Manager entirely usually means one of three things:
- A firmware disable key on the function row, often F8 or F10, marked with a crossed-out camera. This disables the camera below the level Windows can see.
- A BIOS or UEFI setting. Business laptops from Lenovo, Dell and HP frequently expose a camera enable option in firmware. Restart, enter setup with F2 or Delete, and look under security or device configuration.
- A disconnected ribbon cable. If the camera vanished after a screen repair or a drop, the cable running through the hinge may be unseated. This needs service.
macOS and Linux
On macOS there is no device list to inspect. If Photo Booth shows no camera after a restart, see the Mac guide.
On Linux, run lsusb to check the camera is on the USB bus and ls /dev/video* to check a device node exists. Detection at the bus level with no video node usually means the uvcvideo module is not loaded. The Linux page covers this in detail.
Related
Common questions
My webcam is not in Device Manager at all.
Enable Show hidden devices under the View menu first. If it still does not appear, the device is not reaching the computer. Check the cable, try another port, and try the camera on a different computer.
The camera worked yesterday and has vanished today.
Check for a camera disable key on the function row, and confirm nothing changed physically. On a laptop, a recent knock can unseat the ribbon cable through the hinge.
Should I install the manufacturer's driver?
Usually not. Windows includes generic UVC drivers that work with nearly every webcam and are often more reliable than vendor software. Try uninstalling the device and restarting first.
It works on another computer.
Then the camera is fine and the fault is with the original machine: its ports, its drivers, or a firmware setting disabling the device.