Question about Yamaha RX-V992

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Yamaha RX-V992 won't stay on. Starts for a second then shuts off.

I had my receiver boxed for a couple of years, while I was living in a different location. It was stored in the original box and kept at room temperature (no extremes).

I recently unboxed it and set it up. It looked perfectly normal. I plugged it in, turned on the power, and then it shuts off within a second. It acts like there is some kind of internal auto-protection kicking in. But I'm perplexed... the unit was perfectly fine when I boxed it. I can't understand how storage could cause any kind of degradation. Is this a power supply issue?

During the brief second when it is on, I can change some settings (such as input source, speaker set) just before it shuts off. When I try starting it again, the new settings show for that brief second. But it doesn't matter how many times I try--it just won't stay on.

Any ideas or troubleshooting suggestions? Thanks.

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  • Gary
    Gary Jan 05, 2009

    I thought it might be a speaker or component wiring issue as well, so I unplugged everything, unplugged the receiver for a few minutes, then plugged it back in (alone, nothing else attached). It still won't stay on more than a half-second.

    The thing that confuses me is that the unit was sitting in storage for two years, not used at all. And it was working just before I packed it up. Can components degrade without even being used, even when "mothballed" in a protected environment? No moisture or intense heat exposure involved at all.

    Thanks for helping.

  • Gary
    Gary Jan 07, 2009

    I took off the cover of the unit and performed an inspection... looking for anything "unusual" or unexpected. I could find nothing. Clean as a whistle. No sign of damage or a blown component. There is one fuse, but it is coated in some thick white material--I can't see its state. But I have to expect if it wasn't functional, there would be no power whatsoever.

    Anyway, I'm baffled and bummed. And certainly bringing it in for repairs is a waste of time (these amps can be had for around $100 used, so...). I guess the next thing is to pawn it off on CL or EB.

  • jeffry rodriguez
    jeffry rodriguez Jan 12, 2009

    i have the same problem, the unit powers on then in half a second it goes off. i opened the unit to see if anything was blowed or un-pluged. but found nothing. when i power it on the blue supply on the power board makes a sound then another, which could be the power supply. it had white mold inside. i should a air pressure machine to clean inside but still nothing. ima send the unit to a electronic repair store. and what ever he tells me the problem is...ill post it up here.



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  • 73 Answers

Sounds like one of a few things. There is an auto protect feature in most amps and they kick on when one of the following happens. This is assuming that the speakers are plugged in when the problem happens. If not, the power supply is shot or some other non user serviceable problem is happening with the amp.
A. Speakers are out of phase B.The Speakers are way to large for the system C.There is a short in one of the speaker lines. D.The speakers are blown or shorted. E. Last but not least, the power supply for the amp is going, going gone. It could also have gotten some moisture.

Not to be redundant but try some of this. Take a new speaker wire, not the old.
1.Check the phase. For all speakers. Make it the same all the way around,
+red or white stripe, to the red terminal and -black or non striped to the black or negative at the amp and speakers.
2. Start with all speakers unplugged and plug just the right front in. Test it.
If it works ok, then plug in the second speaker, again by itself. Test it.
on and on. By process of elimination, you should be able to isolate the problem. That is of course, if it has anything to do with the speakers.

Posted on Jan 05, 2009

  • charles durando Jan 05, 2009

    Sorry I couldnt be more help.
    Usually components wont degrade in a controlled environment, but It can happen. oxidation happens sometimes even under ideal situations. You could try looking under the hood to see if there are any fuses that are blown if you can find any. Best regards.



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