I'm setting up an iPad for my in-laws. We had to start from the beginning by ordering DSL service for them, so everything is new. There was a conflict with the DSL modem and the Linksys router - both had the same IP address - which was solved by changing the IP on the Router from 192.168.1.1 to 192.168.2.1. I set up the printer, updated the firmware and went through the installation using my Mac, while on the phone with HP tech support (DHCP). Everything worked. Then when the printer was power cycled, it was no longer visible on the Wifi network by either the iPad or the Mac. The blue Wifi light was on solid. It was on the wifi network but had no IP address. Power cycling the modem and router had no effect. The only solution was to reset the printer and set it up all over again using the Mac via USB cable. This happens every time the printer is turned off. I suspect the problem may stem from the new IP for the router (changing the "1" to "2". I thought the answer would be to assign a static IP to the printer but I can't get it to take it. I have reserved an IP on the router for the printer. Every time I try to change the printer IP to static, I enter the IP I have reserved for it, but it tells me the IP is invalid. For subnet, gateway etc., I copied all the same numbers the Mac is using on the same network. Can anyone guide me through step-by-step, how to set up a static IP for this printer?