I bought a Minolta motor drive 1 at a yard sale for $10, there was some scaling and corrosion from batteries having been left in the unit, but it worked fine at the time of purchase. The damned thing only works intermittently, the most annoying thing, it triggers the shutter every now and then when turning it on.

I opened it up and cleaned the contacts, wiring and switches best as possible, it works better than before but still only when it wants to. Any thoughts other than buying another?