I have a Lenovo laptop where my camera used to work on Zoom meetings and now it does not. The light shows up, telling me that the camera is on, but only a black screen. I have done trouble shooting on the laptop, updated drivers, disabled and enabled and still black screen. The camera is the integrated camera that came with the laptop.
The best way to isolate this issue is to try to get the camera to work in a different camera-enabled application.
If the camera doesn't work in any apps (and you have done your due diligence in making sure the camera and drivers are installed), this could be a hardware issue, and the camera may be damaged or have failed.
Physically inspect the camera (sometimes it may be as obvious as physical damage or a privacy screen left closed).
If it does work in other applications, check to see if Zoom has permissions to access the camera:
Check that Zoom has permissions for the camera.
Open the device Settings.
Tap Applications or Apps.
If it does not list access to take pictures and videos or Camera, tap the option and change the permission from Deny to Allow.
Let us know if this helped by marking this as a solution!