An e-mail from OPT Corp says they can't get replacement parts. They could check it out and make adjustments, but if parts are required they'd have to send the mount off to Orion, anyway.

I suppose this could be true for other manufacturers. If so, this would mean that unless the potential repairer can and wishes to manufacture their own replacement parts, repairing mounts is not an option.

On the one hand, I'm probably going to feel pretty foolish if it was (as seems to be the prevailing wisdom) just a matter of a weak power source. But this means the "repair" will be quick and cheap. Just a matter of opening it up, maybe cleaning up the mount a little, then testing and shipping it back. I'll chalk this up to inexperience and an unplanned bit of regular maintenance on my mount.

Thanks for all the comments.