By your description it seems like your TV is not displaying the picture in the fullscreen / PC / pixel mapping mode but rather using a normal TV Wide Screen mode which in majority of the cases "rescale" the original image to cut off about 3 -5 percent of the outside frame of the picture to hide the "imperfections" of the TV broadcast. Try to cycle the TV modes to find the one suitable for playing the games - depending on the TV manucturer / brand they might have differnt names but with the same result - like full screen, pixel mapping, Wide PC etc/