Update:
I plugged in the instrument and left it long enough for the oven to warm
up. I then powered it on. No error messages appeared and the instrument
sweeps fine. I provided a few test signals to the input and they all
look good. 5 GHz, 10 GHz and 15 GHz at 0 dBm all appear as they should.
There's obviously still a problem, but it no longer sounds like my
blunder caused serious damage. I'll keep searching downstream of the -10
and -5.2V rails.
Matt
