I bought a refurbished Denon AVR-1612 from Accessories4Less at the suggestion of this forum and AVSForum. I've had it for about a month and it's been great. When I turned it on last night, it would turn on and then turn off a second later (making a loud click) and then immediately turn back on. It would repeat this cycle of turning off and on until I pulled the plug. I tried again a few hours later and it worked fine. I tried tonight and it went through its on/off cycle. I haven't been able to get it to turn on again. I've unplugged everything (no speakers, no HDMI cables, no nothing) and it still does this power cycle. Any ideas? How much would it cost to get this repaired? I have a Denon authorized repair facility in my city. I only paid $200 for the receiver so I'm hesitant to pay much to repair it. Could I repair it myself?