One Problem (Finally) Solved

The Comcast tech showed up early today, checked the outside wiring, then came upstairs. He checked the wiring at the box end (apparently fine) and then asked which box he was supposed to plug in. When I told him it was the one in his truck, he went and got the correct (!) box, plugged it in, and everything is now working.

He took away the three non-working boxes and the wrong box. I have seen the credit for his visit arrive on my account to offset the charge and the problem is finally solved after three weeks.

It would have been solved much faster and with less effort on everyone's part if they sent me a working box in the first place, but QA needs to do some work on this, it seems. :)