found this at toshiba smart tv.
You might need to press the WPS button on your router but what make of tv is it and how are you trying to connect?
Connect your Toshiba Smart TV to your home network wirelessly via WiFi™ which is either built-in or accessible via an optional dongle depending on model. To ensure the WiFi™ set-up is as simple as possible, select WiFi™ Protected Set-Up (WPS) on your TV, then simply push the WPS button on your router to establish a secure wireless home network connection.
http://www.toshiba.co.uk/innovation/generic/smart-tv/