I must confess your experience is not something I have seen with PSU failure. In my case bad power supply has either manifested itself in a unit that was completely dead one that would chatter but never fully power up. Agree on the linear supply, hope it fixes your problem.

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.