Derrick

Do a flash 80 button 8 hold and then reset the power on both the 7480 and the KSU. also verify your baud rate is correct. On the 7480 if the outer 2 switches are pulled up and away from the circuit board and the center one is down that is 2400 all switches pulled up and away from circuit board is 9600 ribbon cable should not be a problem at all.


Scott