Marantz SR7008 shutoff problem
I've had my SR7008 for a little over a year. It replaced a SR7001 that also kept shutting off on me (it was a while ago, but I think the 7001 error code indicated a line power problem...wouldn't put too much weight in that though). Now the new one has started doing the same (I think). It shuts off and blinks every 2 secs. According to the manual, this is a temperature problem. No way. It's sitting by itself on a table with nothing on top and a fan blowing on it. My amp/speaker setup had been more complicated, but since the problems started again I simplified it. The Marantz is now driving a pair of Klipsch Chorus speakers (8 ohm) with nothing else. The problem still happens. In fact, it now powers off after a minute or two.
I called Marantz tech support. (I bought it from an unauthorized dealer...hope that doesn't come back to haunt me. The seller claimed there would be a way to get support from Marantz if I ever needed it. We might test that.) The Marantz tech guy was supposed to send me a startup procedure that would spit out some code (??) that would help diagnose the problem. However, the instructions I received only showed me how to get to "Protect mode"...power up while holding "zone select" and "back" buttons. I called back and the guy was puzzled...said he would find the correct instructions and email me again. That was a few days ago. I received nothing else. So I continued on with their other instructions: Move the unit to another outlet and power it up with nothing connected to see if it would shut off. It did after a few minutes. I powered it back up and selected "Protect mode" per the instructions above. It is sitting next to me now, still powered up (still nothing connected) going on ten minutes now.
Does anyone have any idea what might have happened or how I could diagnose/fix the problem? For what it's worth, I poked around other options it presented along with Protect mode. When I selected "Service check" mode instead, it reported back "A01: Analog Pass." Not sure what that means if anything.
By the way, my earlier setup had two Chorus speakers wired in parallel for the left speaker and the same for the right speaker...so effectively the left and right speakers were 4 ohm each. But they were connected to the Marantz through an Adcom GFA-5503 amp using the pre-outs. This should have easily been able to support the 4 ohm load. So I don't know what's going on.