Hey Mike
Did you buy this package from Avid dealer and registered the Card and PTHD in your avid account? If so you should have recieved an ASC ticket that you can use for these kind of issues free of charge,
I would also suspect a bad PCIe card. Can you use the internal sound from the mac and get sound from the speaker? Are you able to start PT at all without the hardware by selecting internal sound when holding the N key down?
Many strange things have happened during our 10 yrs with HD setup and last time was before we bought our HDX 2 rig we had the HDN with the HD8x8x8 i/o interface aswell as the Native Pcie and we had to do a PRAM or P Pram or whatever its called and restarting after deleting preferences and all DAE and Plist folders etc it found the card.
Another thing, did you get promted to update Firmware on the PCIe card as that was a major issue for us too when we first tried to install our HDN bundle so if and when you have time please answer all these questions even if you think some are silly and you already tried that so we can exclude what troubleshooting HAVE been done already
Best Regards
Christopher
PS. Håll ut så fixar vi detta. Jag kan skicka detta vidare till Avid tech killarna om det inte löser sig inom närmaste tiden men va snäll och svara på alla frågor så vi kan uitesluta vad som redan är gjort.
Vänliga Hälsningar Christopher