I am feeding the digital outputs of the SBC 1072 to another microntroller IO that only takes 3.3 volt input. So I added diodes for the voltage drop from 5V to about ~3.3V (positive of diode toward phidget). All of the outputs were working fine and my code was working well, but all of a sudden, one of the outputs on the SBC is now floating between 2V and 3V. I've disconnected all of the connecting components from the SBC and restarted it, but the one output is still floating. The checkbox in the interface control panel is also flickering as the output floats. I hope I haven't inadvertently destroyed some hardware. Can someone suggest some troubleshooting steps with a multimeter? Maybe it's a bad diode or FET that I can replace?