Last updated 28 August 2026
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Why black is a useful clue
If a camera is missing or blocked, you get an error. A black image means something else happened: the browser asked for the camera, the camera said yes, and then sent nothing usable. That rules out permission problems entirely and leaves five realistic causes.
1. Another application is holding the camera
This is the most common cause on Windows. Most webcams serve one application at a time. When a second one asks, some drivers refuse outright, but many hand over an empty stream instead, which renders as black.
Close Zoom, Teams, Discord, Skype and OBS completely. Check the system tray, because Teams and Discord keep running after their windows close. Also close any other browser tab with a video call open, including in a different browser.
2. A privacy shutter is closed
Most laptops made since 2020 have a physical sliding cover, and every external webcam worth buying has one too. A closed shutter gives a perfectly black image with no error, because the camera is working correctly and faithfully reporting a completely dark scene.
Look at the bezel above your screen for a tiny tab, usually just a few millimetres wide, and slide it across. On some models the shutter is a rotating ring around the lens.
Test the shutter theory in two seconds. Start the camera test and wave your hand slowly across the lens. If the image stays perfectly black with no change in brightness at all, something is physically covering it.
3. The room is too dark
Cheap webcams have small sensors with poor low-light performance. In a dim room the image can be so dark that it reads as black on a bright monitor. Look closely for very faint outlines, or turn a light on in front of you and watch for any change.
The frame rate reading on our camera test is a good indicator here. Sensors slow down in low light to gather more of it, so an unusually low frame rate alongside a near-black image points at lighting rather than hardware.
4. A virtual camera is selected
Software like OBS, Snap Camera, NVIDIA Broadcast and Zoom's own virtual background feature install virtual cameras that appear in device lists alongside real ones. When the parent application is not running, these output a black frame.
Open the camera source list on the webcam test and check what is actually selected. Names containing "OBS", "Virtual", "Snap" or "NVIDIA" are the ones to avoid unless you specifically want them.
5. The driver is in a bad state
Drivers occasionally get stuck after sleep or after a crashed application. On Windows, open Device Manager, expand Cameras, right-click your camera, disable it, then enable it again. On macOS a restart is the reliable fix, since there is no equivalent manual driver reset.
Working out which one it is
| Symptom | Most likely cause |
|---|---|
| Black in every app, including here | Shutter, driver, or a background app holding the device |
| Black here but fine in another app | The other app has the camera open |
| Black only in one specific app | Wrong camera selected inside that app |
| Very dark rather than truly black | Lighting |
| Was fine, went black after sleep | Driver state; disable and re-enable |