Yesterdays interesting development: our TL-1 lathe lost the ability to use English.
It works just fine in Italian, French, Spanish, and German. but not English.
I called a factory tech, he believes the motherboard's battery went dead, and the machine control code was corrupted as a result. What are the odds of it being the only language I actually use?
Sweet.
By the way, Heidenhain TNC-360 controls have a nifty little feature that informs you that the backup battery has low voltage on power-up.

Apparently, the only way to resolve the problem is to have a HFO tech come out and re-install the machine control goodies.