It kinda depends on where the caps are. If its like 4 caps close to the transformer, or at least close to where the power cord comes in, then its probably... you guessed it part of the power supply, and should be repairable. If its after any transistors, or ic's then... your probably boned.
It used to be you could go down to Radio Shack, and they would have some one there who could do minor repairs like that, but with the shift to cells... they may not, but give them a try first as they might at least know a someone who dabbles, since they still sell hobbyist parts.
After that there's always the yellow pages. A good rule of thumb there is if they do tubes they do what your needing.
As far as price I'd say anywhere from 5 to 50 on the caps, and 30 to 50 on the labor.
If its just a solder job.