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Re: Unit starts to come on and then shuts off and the...
By the wires being loose it sometimes blows the main power circuit.If you unplug everything from the back and it still does it you'll need to take it in and get it fixed..The main power circuit blew or the diode for the speaker power is shorted..
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Before you reset, are you doing this because the amp went in to some sort of protection mode?
Resetting will allow the amp to redo the self diagnosis. But if the problem remains then the amp will shut down again. Resetting doesn't fix things like bad wiring or blown output transistors. So only reset once you are sure you've checked through the system for any problems.
As a safety measure, disconnect your speakers before doing the reset. If the amp goes in to protection again then it is an indication that there are either shorted speaker outputs inside the unit.
Unplug the unit from AC power for 30 minutes, and disconnect all of the speakers and other associated equipment. Upon plugging back in, press and hold the power button at the same time for 5-10 seconds to force a hard reset.
If the unit starts up normally start connecting the speakers one at a time (shutting the power down before connecting each one), until one of the speakers causes the receiver to shut down. This speaker is faulty and would need to be replaced.
If the unit does not power up with NO speakers connected, then it needs the output transistors replaced inside the unit. These directly drive the loudspeaker outputs on the receiver itself, and one or more of them being shorted (closed circuit), will trigger the error on the display of the receiver, and it will not go off until the problem is repaired. They are not user-replaceable as they are PCB mounted, and thermally coupled to a heatsink. In this case, the unit is in need of service.
Unit is in protect mode. Hold "advanced Surround" button and power switch for a couple seconds and it should turn on. If it turns back off, disconnect all your speaker wires and try again. If it still shuts off, the amp is bad and needs to go in for repair.
This is the "protect" mode -- the unit has detected a short circuit in the speaker output and has shut down to keep from burning out the amp.
Remove the speaker wires, then reconnect one at a time. If the LED starts flashing again before you've connected any wires, then the problem is within the receiver. If it starts flashing again when you connect a particular speaker, then the problem is in the wiring to that speaker or the speaker itself.
check your speakers for loose or frayed wires touching across causing ashort. if not , remove 1 speaker at a time unit the the unit stops shutting off. replace that speaker and you should be good to go!
these a couple things you can try to reset,if resetting dont work you will have a amp problem.Try pushing and holding down these 3 buttons s.speaker b and att and exit buttons for at least 3 sec or more.should reset.If not also try pushing and holding down mult speaker and exit and att buttons together for at least 3 or more seconds.if still shuts down you will have shorted transistors inside of unit.
This is a short or unstable ohm load. Remove all speaker wire connections to see if the amp will stay on.
If the problem goes away when disconnecting the speaker wires try this:
1) Check volume level on zone one and zone 2 if connected. If it is too high the amp will go into protect mode and shut off exactly as you described.
2) Make sure no wires are touching any other wire or the metal surface of the amp. This will cause a short and send the amp into protect mode.
The unit is in protect mode. A problem was detected in the final stage of the amp and the unit shuts down to prevent further damage to either the amp or speakers. Check the speaker wires to be sure that they are not crossed anywhere. If with the sepaker wires disconnected, the amp still enters protect mode, the problem is internal to the amp. This is usually defective output transistors. Expect a parts cost between $15-$40.
I have the same receiver and the way to fix is simple. in the main board of this unit there are 5 connectors and they slide into other components like Lego. the issue is the king of material they are made of it's cheap. if you reseat the mainboard it will fix it for a day or two, them it will start again. the easyway is to re seat the board and put a fan inside of the receiver between the transformer and the inside of the amp pointing down about 20 degrees connect the fan to a ajustible voltage adapter and connect it to the outlet in the back of the unit. so it comes on when you turn it on. this voltage adapter is cheap. the adapters people buy for phones and or MP3's at Radio shack or Best buy it goes from 1.5v to 12 volts/ this way you can control how loud the fan is in side the receiver. i find 4.5V does the trick. The connectors on this board start to loose contact with some of the pins when heated. the fan keeps it cool enouth to fix the issue. I fixed manny these ONKYO 804's this will fix it. you just have to do it. the main board is inder the HDMI board in a Vertical position running from one side to almost the Power supply. it has 2 screws also holding it in the inside middle back of the amp. Becarefull with these amps 75 V at 23amp's DC is no joje leave it off for a couple of hours to satart working on it. Good luck.
Time for a little repair here. It seems that one or more channels have developed an excessive drain on the supply, and has caused the threshold to trip and shut you down. It's more than likely shop time at this point....accordianman