Here's the data om ,y machine:
s/n - B X.505.411
Firmware revision: 1.187.10870
secondary Rev. 3
Firmware build 0417:090305

I haven't used the machine since early last summer (2012). Cleaned it up and started to go through the prelims.
Error message: clear board sensor.
Checked and cleaned carefully. No change.
Checked the sensor under Options. Best reading 73.

Is the sensor kaput?

Don