Probably not, if you've ever opened up an amp, you'd find a large circuit board filled with all different size transistors, resistors, capacitors, etc.. Number one, it'd be rather difficult to pinpoint the problem considering you usually cannot just "see" a problem in a circuit board, especially without having the technical schematics of the amp to reference. And number two, once the problem was found, there's a good chance you're not even going to be able to find the exact replacement part.