Samsung UA40ES6200R E-Manual page 162

If the wireless network connection failed...
Wireless network connection failed.
●
No wireless router selected. Go to
Network Settings
Unable to connect to wireless router.
●
Try the following: check if the router
is turned on, and if it is, try turning it
off and on again. Check if you need to
enter a security key to use the router.
IP auto setting failed.
●
to select your router.