Resetting to default

Question

I have a CyberHome mini DVD player (CH-DVD 300). I did not know how to get rid of a black rectangle on my screen when trying to view my DVD so I went into the video menu and under TV system, I chose Auto.What a mistake! The screen content keeps scrolling up and when I try to move the direction buttons to return to the Video menu, the scroll speed keeps increasing. I cannot revert back to NTSC, no matter what I try. Any suggustions?