6700 - Engine Sensor Failure - 391.302.02

Hi,

I have a Xerox 6700 which will not print. The display shows:

Error 391.302.02 

System error. User intervention is required to Power Off/On the machine; service is required if the problem persists. Print service is not available.

I have restarted several time, left the machine off overnight, and replaced the maintenance kit.

None of these steps have helped. Is there somethign else I can try?

Thanks,

ft.