When I had my m-200's set to turn on with the signal the rears would switch off during movies when there was no signal for a while. I got cables to use the 12v trigger for $3 or $4 from Radio Shack.

I also had dropouts that drove me nuts for a long time. Outlaw helped me all along the way. Eventually, I decided that my interconnects were a bit "wobbly" on the M200's. I bought locking interconnects (from Outlaw). And I have not had any dropouts since (although so far it's only been a few days).