Well, I'm looking to replace the control panel overlay, all the buttons and both joysticks. I'm getting most of that stuff from ebay. The main issue I going to have is with the wiring.
Most of the punch buttons, the 1P & 2P start buttons, and the joystcks should be an easy fix; the wires have connectors that slide on and off the microswitches. Pretty simple. However, all of the kick buttons and two of the punch buttons' wires are soldered to the microswitch ends. (?!)
There's also a black wire (I'm guessing it's a ground wire, but I'm no electric engineer) running between each of the buttons. Not sure what that's for or if it's necessary to replace once the buttons and microswitches are replaced.
Here are the pics: