Some real good information here. I have all parts removed from the bike now. I did try to hold and move the magnet and sensor together with the unit turned on and there was no change at the computer no matter how close I put these units. Also, the computer info sheet says it has an automatic turn off if it sits for a few minutes. Then, if you ride off the sensor/magnet, as the wheel turns, will turn the unit back on. I sat there with the parts till it turned off, and again moved the sensor and magnet by each other and it did not turn the unit on as it is supposed to. I think I'll get a new battery and try this again as suggested here.
Thanks. I'll let you know how it turns out.

Jon