My HP Officejet Pro K550 started doing funny things after AT&T came to my home office 3 weeks ago and installed "U-verse," which I do not like at this point in time. Pre U-verse, this printer was on 192.168.2.xxx. I couldn't switch it to the new one (192.168.1.xxx), and therefore couldn't use it. Ultimately, I got rid of the old IP address, but it took on one I've never seen before, 0.0.0.0 for the IP addrress, subnet mask, gateway, DHCP server, and DNS servers. HP won't talk to me about a 6-year old printer, and AT&T techs are hopeless. I have the feeling that someone out there know how to access the printer's configuration page and fix these issues. I don't even care if it's embarassingly easy, as I have been struggling with this problem for a week.