hi! i have 'coby' lcd tv with all video connection and 'jvc' old model of dvd home theatre set (all in one). while playing an original dvd movie, the display not in full screen, only letterbox. i already tried, composite, s-video and component video connection all same. my tv has hdmi but my player not. i want to get a full screen while watching movie from dvd not letterbox. can you help me?