Lost Wireless Connection To Printer

My Partner is a professor at a major university and conducts a consulting business from home. We have 2 old desktops and a new HP Pavilion notebook on our home wireless network. The new notebook was set up by a University tech person 12/10 and was functioning properly. All the computers are linked to our older hp Laser Jet 1300 PCL 6 printer. One day the notebook froze and when rebooted it had lost its connection to the printer. I have done everything I know and followed numerous "geek" instructions to reconnect. So far I have succeeded only in losing my own printer access on my old Dell Dimension 2400 desktop. Prior to that, however, both old desktops were printing, even as the new notebook did not. Connection to the Internet is fine and the signal strength from the new Belkin router is "Excellent".