840 startup error

[Billman2]

We recently inherited an 840 that was working normally in its previous location, then sat around for a couple of months until I had space to set it up. It comes on, begins the startup diagnostics, but then stops with nothing on the LCD; both front LEDs on full; and the rear left LED blinking the error code 9 (1 long, 4 short) which the service manual says is an NVRAM error.
The only mention of troubleshooting the NVRAM requires using the menu, which isn't showing. Xerox/Tektronix says I have to schedule a $$ervice call but won't give me a clue as to how serious the problem is. Anyone encountered this before?

 

[marty5261]

My first suggestion would be to reseat the main board and its components, nvram, memory,etc. Then remove all the covers and ensure all the connectors are seated properly. I have seen everything from printhead to power control, to memory simm cause the same symptoms.