The camera area displays abnormally or does not display

1. Need to check whether there is a problem with the camera's USB port
2. Whether the camera USB is connected and powered
3. Is the camera broken
4. Whether the camera driver is installed or not, and whether the driver is normal. 100D and 700D cameras can use their own software drivers, while 1300D and 1500D cameras need to install their drivers separately.
5. Whether the USB connection is normal, and whether the camera USB interface is connected to the computer interface.