Verify that the problem is not with the device using the port. Try moving the device to another port on the same computer or move the device to another computer. If it works there, return it to this...

Verify that the problem is not with the device using the port. Try moving the device to another port
on the same computer or move the device to another computer. If it works there, return it to this
port. The problem might have been a bad connection.