The beep from the drive unit is some fault and it might be a low voltage alarm or an overload alarm. Simple question - Does it work
? It could be why they asked you to power
it directly. Bad wires are a nortotious problem with almost anything on a boat
and an autopilot has a lot of then running around in all those old familiar places. Rechecking as many connections as possible might find it.
If it is 10 years old the course computer is out of date. Not a problem. You can get a new one that works with the control head
you have. It's the control head that determines the course computer that will work
. You may not need one. Funny
part it is the most expensive component.
RM won't actually fix anything any more. It's very hard to find someone that actually knows how to do board level work.
Mine is far older than 10 years and I can get a new course computer for it and am in the process of replacing mine.