ControLink 2430 won't accept programming

I have an old ControLinc that's been powered on, but unused for a long time.  I tried to reprogram it to stand in for a KeypadLinc that recently failed, and I'm not having much luck.

After deleting all of the old scenes, I linked the new ones (all via the ISY), with no complaints.   When I took it to its intended location and tested, none of the devices responded to button presses, except the All On, All Off, Bright, and Dim buttons, which are sending group commands out, and the 4 devices programmed on buttons 1-4 respond appropriately as a group.

Also, button 1 "On" make a "click-click" sound, rather than the "chirp" that the others make.

In the event viewer, I see the group commands for the 4 working buttons, but no traffic when the individual on/off buttons are used.

I did a restore (no errors)

I did a factory reset (hold down bright while powering on, wait >3 seconds, release), and did another restore, still with the same response.

I deleted it from the ISY and readded, still the same.

Is my controller dead, or is there another incantation that might revive it?   I'm grasping, because the dead KPL is the only convenient way to control devices in the Master BR...

I'm currently leaving the ControLinc set to control two of the lights via All On and All Off as a temporary measure.