MK4 Disc Drive, from a retrofitted 2002 X5. I've narrowed it down to the MK4 computer because when I unplug it, the screen is normal and remains blank. When i plug it back in, it starts going crazy.

This is really wierd. I'm hoping I don't need a new one. I don't know what could have done it but for the past week or two, Its like I saw very slight waves in the screen and now when I unplugged the battery, the system goes crazy. I don't know what to do.