When you turn it on do you get the white dots of death? Most likely a network controller issue. You need a tech to come in and figure out if the pronlem is the controller or the machine. Usually they will connect a laptop to the controller with an alt boot tool to see what is happening.
WorkCentre Pro 40 Communications Problem Encountered: Reset system by turning power off, then on, using the white power switch. This does not work. System would turn off and re-boot to the same message. Router working properly, not a network issue, but issue with Xerox CPU communicating with copier unit. Replaced part 160K92905. Now white power switch does not turn system off at all.