- Check the connection
Make sure the cable is firmly connected to both the device and the computer. - Check device compatibility
Confirm the device is compatible with the computer. - Restart the device
Power off/on the device before attempting to access it. - Restart the computer
Reboot the computer before attempting to access the device. - Check device driver
Verify the appropriate driver for the device is installed on the computer. - Update device driver
If necessary, update the driver to the latest version. - Check user permission
Verify you have the appropriate permissions to access the device.