I've just tried to connect my new HP LaserJet 2420d to my iMac (one of the new Intel ones) and have installed the appropriate software. However, when I click on print (from any application). It goes through all the motions on screen, but nothing comes out of the printer. It doesn't even wake up. When I go to the Printer Queue window, it shows me that there are no jobs pending and that the job I just submitted is now in the 'Completed' list. Incidentally, although I can see the printer in my 'printer setup' window and attached to the USB port in the system profiler, when I open the 'hp printer selector' application, no printer is shown. I have also tried downloading the latest hp driver from the hp website to no avail. Any suggestions?