This may have been discussed.

by R. Proffitt Moderator - 5/24/13 12:38 PM

In Reply to: Samsung UN50F6300 Vs Cisco EA3500 by praneethnag

Something rings a bell here. Try this on another router before you lose all your hair.

There's more that I can't see in your post such as DISTANCE TO THE ROUTER. TVs are much shorter. Start at 20 feet for now.
Bob