I'm being told I have Excellent Signal, ALL other TVs and Phones connect with no problems. But everytime I try to stream TV or movies All it does is buffer, play for 5 min then buffer for 10....over and over. Get on my other tv and it plays fine, no buff no nothing. I have restarted the TV and my Router it has not helped. Again telling me I have a EXCELLENT SIGNAL but constantly buffers.......ANY ADVICE?