Set the output in the Video menu to "16:9 widescreen" or press the "Auto" button on yer telly!!
Assuming that is, you got a widescreen TV, if not, select eithe 4:3 pan and scan or 4:3 mode.
However, on most DVD discs, this will still result in black bars top and bottom
AIWA 370 (officially) ROCKS!!!!!!!