UNPLUG DVD--- Remove top cover 5 screws, remove front of DVD, this is clipped on, 2 on the side & 3 underneath. You can now remove the top of disc housing 4 screws, to remove disc. When replacing top of disc housing make sure you locate the sliding part inside in groove of top of the disc housing. You can use a thin screwdriver.
Michael Jillings, January 2007