fwiw, i've never had a single problem like this my 861.3 in about a year or so of use. i control it RS232 via crestron and sometimes manually and via the MSR when i'm right in front of it (the boss has a way of bringing and leaving the crestron controller remote upstairs - sigh - i just work here).
the only oddity i have is that if i shut the unit off by hand, when i try to turn it on by selecting a source via crestron, i have to do it twice to get it to respond.
other than that one tiny little stupid thing, the damn unit has been ROCK solid.
doody.