My 9632 has several problems: The analog output adds a high amplitude 'digital sounding ' noise to the signal whenever the card is playing back audio. Also, the coaxial S/PDIF as well as the AES/EBU inputs don't work, not showing any incoming signal, they don't sync. The analog input works fine, so does the ADAT input. 

There were two damaged 220uf electrolytic capacitors (showing signs of overheating and checking revealed reduced capacity), replacing them didn't get rid of the problems unfortunately. Everything else on the board looks fine to the eye, I've also tested the two zeners which were OK.

It looks to me like two different, maybe even independent defects. The only function I really need is either AES/EBU or S/PDIF IN. But with the card inside the computer I've no way of testing anything beyond what I've already done. Is there an obvious part to replace, maybe a component that gets damaged first when overvoltage gets through the S/PDIF input (which might have happened)? Also, without schematics I'm kinda stuck...

Thanks!
GS