I don't remember where I read it, but I recall an article that talked about
how the servo motors in our autopilots normally run for such short intervals
and at slow speed that they can "gum up" or the dust that the brushes create
can build up and or the commentator can varnish over. The article suggested
using the heading bug, trim, and or test modes to run the servos at high
speed first one direction and then the other occasionally, say once per
month, to "blow" things out and to scrub the brushes and armature.

YMMV, just something I remember reading.
Jim

"Viperdoc" wrote in message
...
I've had this plane for nearly five years, and am happy with its condition
and performance. It is not new to me, and I had an extensive
pre-buy/annual prior to the purchase.

Short of buying something that burns kerosene (which I can't afford) I'm
sticking with it for a while. I expect stuff to break or need replacement
periodically.

It looks like the roll servo is the culprit- it needs a new motor and
drive transistors, along with a new resistor.

The strobe problem is likely the power supply, which will also need
replacement. The whole thing is likely to be around $2500+.