A few weeks back I plugged the wrong RS232 cable into my K2/100 and smoked it. I have since replaced the K2/MCU, KPA100/U4 and KPA100/U1. My current troubleshooting path is to determine why I don't have 5v anywhere on the KPA100. Can someone tell me where the 5v originates from for the KPA100? Thanks Roy Vickers KF5YU