Just some Breaking News which I will update as things progress: About two weeks ago, my SR5012 went "stupid," ie: no sound, no display, nothing. This happened when I turned it on in the afternoon, after it working just fine since purchase (9-10 months ago). Did soft reset, hard reset (without unplugging all sources).
Long story short, it was still under warranty so I was given the option of finding a local authorized repair outlet (logistical nightmare) or shipping it to west coast regional repair (Adams Electronics, Huntington Beach, CA). I chose the latter. Got a voicemail saying it was the "digital board" and it would take a week to get the part, they would call with updates.
Couple of curious aspects: 1. I lost a TiVO box at exactly the same window of time; and 2. This is the second "digital board" to go out on a Marantz AVR. Conclusions: probably a power hit (although no storms during that 24 hour period) and I have a Panamax power conditioner.
I will update this post as things develop.
Panasonic 2013 55VT60
Marantz SR-5012 AVR
B&W 805 Speakers
Velodyne 10" Sub