I have reinstalled the RF distribution box, as well put in the AS110 demod board. I plugged everything back in, and turned it all on.
The switch on the distribution box may be starting to fail. When I was turning the box on, I could depress the button, and see the blue glow, but it wouldn't catch, so when I removed my finger, the glow went away. I was afraid that I'd have to pull the box, but after a few more button toggles, I got it to stay on. I'm leaving it for now, but we should remember that this may be a problem.
I will look at the phases of all the PDs, but none should need changing except POP 110. Every other PD has the exact same cables as before.