If you check these boards, you will see that the power supply is the achilles heel of these 800 series components - or at least it is in some of the older ones. I recently had my 800 back at Meridian for a ROM drive replacement and asked them to replace the power supply as the unit was just coming to the end of its warrant period.

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.