Originally Posted by Crion
I would check all connections inside. In particular there is a small white connector box where the toroid is connected to the motherboard. Be sure to pull-test the connecting cables because the screw connectors are not supersnug fit for the cables. An easy test instead of shipping the unit off.
Indeed, the most fidly part of the LPSU replacement. Very easy to not get a good connection. Also, new LPSU requires a different fuse for 115V operation (3.15 A versus 1.6 A - has to be a T fuse; T for timed or slo-blo). My upgraded v8 has been rock solid (although now I've likely jinxed myself).

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.