Sony has a Protector mode on Its STR DA30ES(50,80) AV systems. Sony says to unplug for 30 mins., but this doesn't work. Unplug everything you can inside. It worked all day and so I reassembled. Protector came back with (FAN) beside it. No fan? After unplugging, it is back to just PROTECTOR. Sony says send to repair service. Service manual gives no glue. Anyone have any Idea?