57011 head unit stopped working after replacement Harman expansion box install.

Hey all, I just installed a new (well, used, and presumably tested) Harman bluetooth / USB expansion unit since mine died a while back for my 2012 Prius V with the 57011 head unit.

Even though the part number is exactly the same as the old one, once I had it in and started the car, the radio played for a few seconds then the entire screen went blank and silent. Pressing the various buttons tries to bring up the setup buttons on the screen, but they disappear after a couple of seconds.

Is there a factory reset I can do that will re-initialize the head unit, or do I need to take it to Toyota? I figured the new expansion part might not work, but I didn't count on the whole radio head unit going down. :-(

Attached is a pic of the part - it's an exact match to the one that was installed originally (why can't things just work the first time?).

Any advice would be greatly appreciated!