I think the screen doesn't light up because of USB AA cable.
And no, you cannot have acces to PWS program, just Xerox engineers.
Hi,
"communications problem encountered" it is a error from a drained battery (one yellow battery, but not an ordinary one, it is a time keeper battery) inside the controller.
Anyway even if you will replace the battery, you will need a tech with a laptop with PWS to reconfigure the printer.
Gabi