I have an HP LaserJet 4200 that serves as a printer for the network.
Recently, the printer became overwhelmed with jobs being sent to it and crashed. We purged all the documents in the print queue and restarted the printer.
At that point, the LCD no longer showed messages. It is still brightly lit; there are just no words on the screen.
We have re-booted the server and re-started the printer; all to no avail.
How do I get my messages back?