Question about Yamaha Audio Players & Recorders

3 Answers

Why does my receiver have no power and can't turn on?

Hi, my Yamaha AV Receiver HTR-5940 (EU) stop working the second time. First time and now the second time the same thing, no power, can't turn the device on. First time the service told me that the power supply was burned and they have replaced it. I used the receiver 5 times and now it doesn't work again. Can some one help me fix it by my self please :) I have tried the following following the users manual: General TROUBLESHOOTING This unit fails to turn on or enters the standby mode soon after the power is turned on. The power cable is not connected or the plug is not completely inserted. Connect the power cable firmly. - The speaker impedance setting is incorrect. Set the speaker impedance to match your speakers. - The protection circuitry has been activated. Make sure that all speaker wire connections on this unit and on all speakers are secure and that the wire for each connection does not touch anything other than its respective connection. - This unit has been exposed to a strong external electric shock (such as lightning or strong static electricity). Set this unit to the standby mode, disconnect the power cable, plug it back in after 30 seconds and then use it normally.

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  • Yamaha Master
  • 1,054 Answers

What exactly is the unit doing? Do you hear a relay click or anything when you press the power button?

Posted on Apr 03, 2015

Testimonial: "No relay click, just the button it self."

  • 1 more comment 
  • Steve K Apr 03, 2015

    could be locked in protection mode. Try holding down the "INPUT MODE" and "MULTI CH INPUT" buttons and then press power. If it does turn on, make sure to look at the display when it first powers up. This will tell you what part of the protection circuit was triggered causing the unit to shut down.

  • Giuseppe
    Giuseppe Apr 03, 2015

    Didn't work, the receiver shows no life signs :(

  • Steve K Apr 04, 2015

    Sounds like it would need to be looked at directly by a pro. It could be either something in the standby power supply, or digital board. Hard to troubleshoot something like this via email.

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  • Yamaha Master
  • 487 Answers

Have you checked the internal fuses?

Posted on Apr 03, 2015

Testimonial: "I have not, how do i do that? I suppose that i need a multimeter?"

  • Giuseppe
    Giuseppe Apr 03, 2015

    I know where they are, one is transparent the other is ceramic.

  • Giuseppe
    Giuseppe Apr 04, 2015

    Checked both of them, they are ok.

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  • Contributor
  • 17 Answers

It is possible that the Standby/On switch contacts are intermittent. You might try spraying some contact cleaner on it. I use LPS Electro 140. It's not cheap, but it has solved quite a few problems, including noisy volume controls, relay contacts, and flashlight contacts. For best access you'll want to remove the cover and spray just area where the button shaft enters the switch body. First put a cloth around the around the switch to shield the surrounding areas. The power relay, mentioned by Steve K, is also a candidate for intermittent contacts. If the cover is removable, spray the contacts, using a shield as before. If the relay is the culprit, I recommend that you clean the contacts with a narrow strip of heavy paper (like from a business card). Be careful not to overstress the contacts by over-bending them. Start with a dry strip, then moisten another strip with a little LPS.
Electro 140 Cleaner Aerosol 11 oz

Posted on Apr 04, 2015

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Posted on Jan 02, 2017

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