[TG] ST6001 Smart Pilot Blows Breaker

[Tom - Raymarine - Moderator]

Generally speaking, Course Computers aren't really repairable. There are a few specific, known problems where there's a particular component that causes characteristic symptoms that are exceptions, but if the root cause isn't known or where there's a short or near-short as in this case, then usually:
[*]diagnosing the problem can take a lot of time, perhaps more labour time than is economic
[*]very often, other components will be damaged/stressed around the failed one, making a repaired board unreliable in the future
[*]small surface-mount components and conformally-coated boards can make repairs physically difficult in some cases
[*]on older products, components may be discontinued or non-ROHS-compliant and hard or impossible to find

I'd look for a T150, T150G, S2, S2G, T400, T400G, S3 or S3G course computer (T150 is the same hardware as S2, just an earlier model name, the G-versions are the improved model with Rate Gyro, T400/T400G/S3/S3G are the next model up that are a drop-in replacement for the T150/S2) second-hand, or look to upgrade to a new pilot system. If you're looking to upgrade you'd need to replace all of the electronic components of the pilot but would not need to replace the drive unit or rudder-position sensor if they were working well.

Regards,
Tom