Bizhub 423 "failed to start" message

I havea Biz423 which displays a "failed to start. Please turn power off/on" message. It will not allow you to do anything unless you restart it and then it comes back up after a couple minutes. It is either a hard drive issue or fax board. In service mode, it has a code B-0003. If I unset the fax board it will print. I just want to make sure it is a fax board issue and not memory of some other type. Anyone have any other ideas or had this problem?
Thanks for any help!