Samsung UN75ES9000F E-Manual page 149

Internet status.
When 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 that 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.
to select your router.