Did you tried to watch the DVD in the proper mode? (IE by booting the PS2 from standby in PSX-DVD mode by pressing and holding the RESET button until the blue light turn on) Try it if you haven't. Or you can simply turn off the Magic 3.1 to watch your DVD or listen to music cd by booting from stanby by pressing the RESET button for more than 6 seconds.
Let us know if it work
"Video games don't affect kids, I mean if Pac Man affected us as kids, we'd all run around in a darkened room munching pills and listening to repetitive music."