Hmmm,
Now the question that comes to mind is to check any of the connecting circuits in order to rule out the possibility that something else from a different component or even something not working correctly on one of the circuit boards or motherboards, is the cause for the Capacitor bank to blow open like it did. If you do'nt have the experience in troubleshooting all of the circuits inside of your machine, then I suggest that you bring it to someone that's factory authorized to do so - that is, if you think the machine is worth maintaining for future use.
I say this because I do'nt think that the only way to fix your machine is to simply replace that capacitor bank or is it a single capacitor connected to a bank of capacitors? In any event, The gentleman named "KSellon" seems to have experience with these machines so, I would also follow up on his advice too.
Have you also contacted Thermal Arc customer service describing your current discovery?
Please let us know what you find out with respect to the ultimate cause of your machine's component failure. ;)
Respectfully,
Henry