I have a 4 port self powered USB Hub by Asante that has 2 LED's for each port: One for Power (green) , the other one Overcurrent (red). When I turn my PC off, two of the LEDs stay green but two of the ports turn the Overcurrent light on and keep it on until I turn the PC on. Will this harm my USB devices? I have a Scanner, MS Optical Mouse, Zip250, and a Logitech Windgman Rumblepad all hooked up to the hub.