Yes there are plenty of people who can fix your computer. There's that Amiga place in France (I think) and "PG" helped me with an Accelerater not so long ago, but weather he can do actual machines I don't know.
Chances are it will work, they are built very well as a rule.
Usual issues are as follows:
Capasitors, battery leakage, CPU issues (030 or 040) and even sometimes rust.
