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Re: RXV1200 A/V receiver
Please check your speaker cabling first for possible short connections. if all ok, then remove the speakers (all) and try to turn on the unit. If still doing the same thing then you have busted one of your amplifier. it can be any of the amplifiers (main center surround etc...
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Try pressing and holding the 'tone control' and 'info' buttons, then press power. This should unlock the protection lock. the lock is there so that the unit cannot be repeatedly turned on when there is a problem that could cause permanent damage to the circuitry.
Disconnect ALL of the speaker wires from the back. Turn it on again, if it still trips, then the unit needs to be repaired. If it does not trip with no speaker wires connected, turn it back off, connect 1 speaker at a time and turn it on, when it does trip, that speaker that you just put on has a short somewhere, it could the be the wire or in the speaker.
Your drawing to many watts from the unit and its shutting down. Make sure the -/+ are set properly for the speakers. Also the power amp inside the unit could be bad and the relay trips off. Plug straight into the wall and don't go through a powerstrip. Is anything else connected to the receiver?
There is or seems to be a bad or cold solder connection on that Printed circuit board that is going to need to be resoldered or it can cause more damage to the unit. And on this model, the fan will start at power up but shut down untill the output section heat sinks get hot.