Just from my experience.
My Jurassic Park never had an issue until suddenly the sound started to cut out or take minutes to start working. It started having other issues within a few days as well. I pulled the Power Supply Board and it all *looked* just fine. Removed all the caps and this is what I found...
Unfriendly surprise to find. I ended up having Chris Hibler repair the trace damage caused by the leaky cap and replace all the caps on the board with new. I believe he had to replace both D2 and D3 due to corrosion.
Works perfect now.
Quoted from mikat11:
Power supply board ,replace caps C1,C2,C3,C7. These are near the big aluminum heat sink and dry out over time and it takes a minute or more for them to charge up and supply 5 volts to the CPU board and the sound board. C2 is especially prom to leakage and failure. A very common problem on Data East power supplies.
Exactly what happened to me. That C2 cap wasn't nice to my board at all after it leaked.