I could fine from my mac to my epson wirelessly until we changed internet service providers. We made the switch and I updated the computer and the printer with the new network codes and passwords but the wifi light on the printer will not come on and the computer keeps saying the printer is offline.
just reset the printer to defaults and start from scratch. make sure you haver the right type of authentication selected (WAP/WEP etc.) whatever your router is set to. reinstall the printer driver also.