Xerographic Problem for Xerox 7655?

I have Xerox Work Center 7655
The error message says, copying and printing not available.
There is a xerographic Problem.

Xerox company had told me that there is no xerographic Module for the Xerox WC 7655. The fuser is new. The drums also have more than 60% life.

I would appreciate if anybody could give me a good suggestion as to what the problem could be.

Thank you very much

Rajan George
April 2009