I have a client with an HP PSC 2400 Photosmart Serises All-in-One connected to a new computer running Win Vista. It was printing fine for awhile and now will not print at all. It is on and seems normal but will not print. HP tech sup[port first told her that it is not compatible with Vista. Then they told her it is and had her unplug it and uninstall and reinstall it and it still does not work. I want to help her out BUT wanted to get a few suggestions from EE first.