I received the replacement modem today. The first thing I did was to plug it into the old power supply. Guess what? I isolated the problem to the old power supply. I immediately tried the old modem with the new power supply and guess what?
I haven't been able to get the new modem to work properly, so I'm running on the old one. I haven't decided which one I will ultimately keep.
Yesterday, I finished my first short story in several months. It's a story intended for the J.J. Adams anthology Federations. I'm setting it aside while I work on another short--the one I'm working on for the Jay Lake anthology. Wish me luck with those.