Screen has a thin horizontal line at about 1/3 down the screen, and another at about 2/3 down. After playing for a while, the picture will dimm, and at times go almost dark but not quite. Picture looks like static from a bad connection. Sometimes, a light tap on one side of the case or the other side will snap the picture back as it should be, sometimes not. Need to know if anyone has an idea, or if a repair manual is available for this tv?