The subject should really have been: When is the same model printer not the same printer? but it didn’t fit.
To explain further. Our HP DeskJet 990Cxi started making a noise like a coffee grinder, so we invoked our three-year Support Pack to get a replacement unit delivered.
You’d think that all we had to do was remove the failing unit and replace it by the new unit, and all would be well? Well, it wasn’t. When the PC was powered up, the printer was shown as offline. Changing it to online didn’t help. It would print its standard test page from the printer, but it didn’t seem to want to talk to the (Windows XP Pro) PC down the USB cable.
Cutting a long story short, after 45 minutes on the phone and three HP support staff later, the second techie said that:
it was necessary to uninstall and reinstall the printer software because some details of the old
printer (like, presumably, serial number?) were written to the hard disk, and so a replacement
printer of exactly the same type/model/etc would NOT work without a driver/software reinstall.
Did any of you chaps/ms-chaps know this???