I just bought a 2001 S80 Executive to replace my 99 S80 (250,000 and still strong) and I can not get the dvd screen to work. DVD player turns on and says it is playing but there is no sound and the screen is not showing anything. There is a button in the rear console that says DVD but when i push it nothing happens. It looks like there is a light in it that should light up butt it does not. Should this button light up? Is there a fuse for this? My owners manual does not say anything about the rear console or DVD system. Thanks in advance.