Samsung PN51E6500EFXZA - Manual (Page 155)

If the wireless network connection failed...
●
Wireless network connection failed.
No wireless router selected. Go to
Network Settings to select your router.
●
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.
Try the following to set your IP address