I looked on KM website and all it said was....
WARNING:
UNDER NO CIRCUMSTANCES should a reset of the NVRAM be performed on the C500. This procedure does not reset the machine back to factory defaults, and will render the machine inoperable.
I will try to do some more research and get back to you. Sounds like the main board may need to be sent back to be reprogramed. You might try to reflash the firmware. But I do not think that it will help. Worth a try, though.
