So I have a client with a couple of Apple MAc's for the design team. They have two identical HP CP5520 Colour LaserJets, even built in the same month, same firmware, etc. One of the Mac's can print to one of them and not the other. Just hangs at "Printing - Connected to Printer" until eventually it pauses the printer. I have tried both via "Secure AirPrint" and the other driver listed which I assume is Jet Direct. Both methods work fine with the other printer.
I have compared every web manage page and cannot see any differences other than, and this sounds completely irrelevant, in the General Troubleshooting page, one of the pages auto-hides the options for the paper path test, and the other doesn't.
Very confused. Off to find out how to turn the CUPS web interface on to see if that tells me anything.