I'm having a problem with my 3 week old TV. I'm already on my 3rd tv

due to the fact that the game mode is messed up. 1st tv I had a scratch on the screen(floor model) so they sent out a brand new tv but soon after, i was playing PS3 with game mode on and out of nowhere there were these weird lines on the top of the screen. So I called BB and they sent out another TV and just my luck this TV is having the same issue. When I was planning on Calibrating the 2nd TV the tech thought the processor was bad and said i should schedule to get a new TV. I've changed my HDMI cords, inputs and nothing has worked... The problem occurs most when there are quick movements. It seems like the top of the screen cannot keep up with the bottom half. My buddy had the exact same TV and problem!! when he got his 2nd replacement TV he never had the problem again. Can anyone help? am i DOOMED?????
Thanks