I was pulling the avionics boxes to verify serial numbers and now I've got a
problem with my SL30.

At first, it was dead so I re-racked it. That got it to power up, but now I
can't transmit or received on it.

The NAV side works fine, but the data to the external OBS may be screwed up.

What have I done? What can I do?

TIA,

- Kino