Thanks for the reply, Mark. I re-seated the pins, and that didn't seem to help. When I re-seated them, I made sure that the connector part sticks up enough, and that it looked like the rest. I also removed the loopback, and that did not seem to help (it just did not force AC/Home).

I tested pin 5 of the serial port with the main grounding pin (13) of the dock connector with my multimeter, and they are indeed connected, so I know that pin 5 is grounded.

Here is the complete wiring diagram:



Did I do something wrong?