I am absolutely stumped. I posted my problems to the Apple Discussions and so far no resolution. I have an HP 6700 printer that stopped working.... Couldn't get our MacBook Pros (hubby and mine) to see the printer and my iPhone and iPad were no longer able to use AirPrint. What was weird is that if I went to the control panel on the printer it would print one time. If I needed to print again I had to go to the control panel again and setup the network, even though I didn't change anything. I tried several things but thought, ok, something broke with the wifi. So I ordered a new printer, an Epson WF 3620. Installed the new software. I used the control panel on the printer to setup the network. No problem. Print out the network page and says everything is fine. EXCEPT it won't print. Well, not entirely true. I talked to Epson several times this week and finally it will print now that I have the IP address for the location. Otherwise our laptops can't see the printer! My iDevices can't see the printer-I downloaded the Epson iPrint app, managed to setup Epson Connect (not through the app on my Mac but by entering the IP address of the printer) but the iDevices can't see the printer. The printer is selected in the app (Epson iPrint) but if I go to print an email, etc., it says no AirPrint printer found. At one point the Epson app said there was a communication error. I deleted the app and reinstalled it. Made no difference. I am very puzzled. The only new 'thing' that I have added lately is an Transporter Sync. I tried unplugging it and it didn't make any difference. Two printers, same issue. Anyone have any clue what is going on? I am running the latest Mavericks. I have a 4S and an iPad 4th gen. ASUS router. Cisco modem. Help please.... This is driving me nuts! Update: Nothing new other than I ran Disk Utility from the Recover Disk and reinstalled Mavericks from the Recover Disk. I also reset the printers. All this did nothing to help me figure out what's wrong. I am thinking nuke and pave is the only solution left.