Thanks to all for the help.
It seems I now have a VFR autopilot. I have flown 8 legs in the last 3 wks (all in clear weather) and it flew just fine. I tried Bob's suggestions in the hanger and it worked perfectly. Of coarse, the only time it has been failing is when I actually need it (low ceilings, clouds, ice, etc.).
I seriously am wondering if I might be getting some moisture in the unit in bad weather (some sort of leak around the computer area). I pulled the ceiling liner to see if there was anything obvious (there was not). Anyway- my next coarse of action is to test for leaks.
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