I am looking at the card I replaced in my 4310 and the bridgeCo chip is marked:
DM860
0903UFC (might be 0903UPC)
BP1506.01
The chip that has the white label and the MAC address is marked cm860-3.
The best way to distinguish this card from the new one is the gold along the edge of the card. Don't panic if you have the old card. Mine ran fine for a year. I chose to replace it myself to avoid the turn around time in the service center just before Christmas. You have a two year warantee. It only takes a phillips screwdriver to repace the part yourself and chances are the cost of the part will go down with time.
DM860
0903UFC (might be 0903UPC)
BP1506.01
The chip that has the white label and the MAC address is marked cm860-3.
The best way to distinguish this card from the new one is the gold along the edge of the card. Don't panic if you have the old card. Mine ran fine for a year. I chose to replace it myself to avoid the turn around time in the service center just before Christmas. You have a two year warantee. It only takes a phillips screwdriver to repace the part yourself and chances are the cost of the part will go down with time.












And instead of an original remote, consider an older model (but new) Harmony universal for $60 or so which will handle Z2/3 as well and make your HT switching easier to boot. You will need a DM-A409 mic, and we used to recommend cheap ones off ebay but you should go with an authorized supplier to be sure you get one that works.

. You would think they could come up with a solution like take your Denon into an authorized dealer with a service center and have them do it..Denon has really dropped the ball on this one.
was not an issue for me. This information was not presented to you or anyone else to suggest that you open up your machine and do the repairs yourself. It was simply the approach I took when given the various options. I have a fairly complex system, using AVR4310 as a pre/pro and running audyssey takes 20 mins, remembering all the other settings and making those adjustments usually takes me several days as I play with it and remember