When watching a DVD in Wide Screen 2, which should have the smallest black lines. The bottom black line is very very small but the top black line is wide like Wide Screen 3. All other Wide Screen choices WS1, WS3, Full have the same size black line top and bottom , only WS2 has wide on top and very small on bottom. Does the TV have a problem or is it the DVD player? Can I adjust it myself or do I need service.