Well, mine's apparently dead.
I plugged it in, it does all the normal happy new-device-on-USB stuff, and the LEDs synch with those on the other keyboard, but it's not sending any keystrokes at all.
I installed a USB sniffer, and it just isn't even sending traffic. The device identifies correctly (Surf Ruffian 122 Keyboard v2.50 apparently... what a name
)
Even removing the controller and shorting the membrane contacts pins on its edges directly does nothing.
The only thing I can think is "defective controller" or "wildly messed up internals somehow"
Update... it seems to be loose membrane contact... after some finagling, I can get it to respond to *some* keys, and map others to complete nonsense.
I suspect what's gone wrong is the little piece of soft foam that tensions the membrane against the PCB has become soft and distorted, making it provide poor contact and shorts.
For whatever respect I have for Unicomp and their products, this is the second board I've had difficulty with the membrane attachment. Bought a used Customizer 104 in 2009, ended up wrecking the holes that held the membrane in line at the connector. The old style "edge connector" used on 1391401s seems much more bulletproof.