I'm not going to be much help I'm afraid. I dont have any experience with this machine. It it was strictly a printer and I had this problem I would perform hard disk initialization (whether formatted or not), perform cold reset with all optional devices removed, and upgrade firmware. Whether you can do that on that machine, I have no idea.
Since its not a printer, I would suggest obtaining a service manual as a first step. Please post the fix, cause I'd like to know and I got a feeling we're going to run into this again.
