Good morning, I bought a Hunter 33 (2005) in the fall of 2003. It came with a Raymarine ST 4000 autopilot. The autopilot worked very well until 4 weeks ago when it started to stop working on occasion - I would turn it off / on and it would work again until 2 weeks ago, when it completely stopped working completely. We checked all the wiring (the readings were as recommended in the manual), but the system kept on indicating "no signal" when I would turn it on auto. The "no signal " stops as soon as I put it back on standby. We checked the fluxgate compass all seems ok but just in case we replaced it with a new one and still no success. We tried to recalibrate and still no success. Has anyone experienced anything similar ? Many thanks for any tips. Christophe