I have an old Celestron CG-5 ASGT mount. I hadn't used it in a while and brought it out and found that the declination won't slew at anything other than its highest speed. Even when I try to do an alignment, normally it would use higher speed for the rough align, then go to slow speed for the fine align. But even then, it's full speed. I've tried doing a "quick align" and adjusting speed - but it stays at full speed still. I've done a factory reset, but that changed nothing. I've also swapped out hand controls for a newer one, still no good. I have tried 3 different dec cables, and that's not the issue either.
So, at this point, I'm guessing it's in the electronics. From what I've gleaned from reading some other posts, the culprit could be the dec encoder, the dec board, or the main board. Can anyone clue me in on how to check without replacing them all one-by-one?