Me again... so, the inverter worked great. I switched over to just using a mini instead of optical out, so I ignored the audio problem for a while. The past couple weeks, however, I've had an issue with finder crashing and not relaunching, and I think I've isolated it to the eSATA expresscard I've been using - it no longer stays in when I push it into the port.
Do you think I need to fully replace the card, or could there be some adjustment I could make within the case? Or am I way off base and it won't solve anything?
Thanks for your help.