yellow

Hi, I've bought a Samsung UE32EH5000W which the seller told me to be new. The TV seems to work fine, but every time that the TV is on for 5-10 minutes a yellow/orange vertical line appears on the right edge of the TV, if I try to turn it off and turn it on again sometimes the line remains...

Please help me troubleshoot my led TV. When I play a bluray or 1080p video tight clusters of blue and less obviously yellow pixels appear to "shimmer" on the TV display. The blue shimmering pixels are very obvious when playing a film and both the blue and yellow pixels are even more obvious on...