TV TYPE:
4:3 Pan & Scan
4:3 Letterbox
16:9


HDMI/YPbPr:
480i
480p
720p
1080i

4:3 OVERRIDE
off
480i
480p
Stretch


Could someone help explain the settings associated with the "4:3 OVERRIDE" section?

install batteries in new Directv HR21-200 DVR remote
Put cover back on - problems go away :)