Wow! This group is still active? Great! I was a bit surprised to receive this email this morning.
I don't know the exact nature of the issue you're seeing, and (knock on wood) I've not had any such issues with my Andromeda, but, I have heard that odd knob behavior is sometimes resoved by re-seating the ribbon cables inside the synth.
There's a discussion on this on Gearslutz:
Looks like there used to be a photo showing how to open the case, but it's not there anymore.
If you can't find the info, I've got a copy of the service manual in PDF format I could send you.
Russ