My 800 will play CDs, but not DVD (or DVD-A) where it does the same thing you decribe. My sense is that the problem is probably going to result in a drive replacement, although, if you find out otherwise please do let me know.

My Kit: 861v8+ID41, 800v4, UHD722, MD600, MS600, MS200, Oppo BDP-203, Genesis 201, Genesis 350 SE, Genesis S4-8 Sub, BG 520i, VTL MB450 II, Krell Showcase 7, Genesis 928 Subs, Danley DTS10 sub, SVS Ultra 16 subs.