I have a C-4000 and one of the cards are bad, so I pulled it out & the pre seems to work fine. I'm using it in a standard 2-channel set-up, so guessing the card has something to do w/the holographic aspect. So, if I run it like this am I just bypassing a circuit or am I headed for trouble down the road?
All the tone controls, including all the buttons on the left, work fine, along w/volume & balance. The headphone output works too.
On the pic of the card, the pointer shows where the smoke got out. On the unit, the pen shows where it went.
Hope to hear back from somebody!