Question about Yamaha RX-V640 6.1 Channels Receiver

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Yamaha RX-V640 turns on/off with clicking noise repeatedly. Can I fix?

Device turns on then click and screen turns off, then click and on again repeats till turned off. for the second the screen lights up Volume is going up and down. Without any connections or with speakers connected - the same

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  • Juan Pablo Apr 27, 2013

    i have a similar problem but not as bad. Without any source connected, I just turn it on and increase the volume a bit, it starts making popping noises. If I connect my ipod, I can hear the music, with the random popping and squicling noises. I connecte other devices to other inputs, same thing. I moved the speakers from A to B: same thing. I opened and sprayed contact cleanner to the volume controller, no help. Any other ideas?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: Yamaha RX-V793 flashing light on volume control and no volume

Per Yamaha support page: The volume light on my Yamaha AV receiver is flashing, what does this mean ? The "MUTE" function on your remote control has been activated. The reason that you can still hear a very low sound is that the muting circuit within your stereo is not a full mute, but rather a -20dB mute. To deactivate the "MUTE" function, simply press the "MUTE" button on your remote control. (Make sure the volume control is turned down to avoid damage to your system.) If you misplace or lose your remote control, you will have to purchase a new remote control unit, as there is no duplicate function on the front panel of your stereo. Unplugging the stereo will not deactivate the muting circuit, as the microprocessor "remembers" if the muting circuit was active prior to being turned off or unplugged. If you need to purchase a remote control, you may order one directly from our parts office. You may reach them by dialing (714) 522-9888 from 8 am to 3 p.m. Pacific Time, Monday through Friday. If you have any other questions, please contact our customer service department by dialing (800) 292-2982 Monday through Friday from 8:00 a.m. to 4:00 p.m.

Posted on Sep 12, 2006

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SOURCE: Yamaha RX-V1500 Shuts down after 2 seconds

This set is getting old and is in the Archives section of the Yamaha consumer guide area. But, you can still download the owners manual if you need one. If it is going into protection mode even when there are no speakers connected OR when the sound level is very, very low or zero it is not good news. Yes, unplugging the line cord will cause the protection system to reset itself. But, if it shuts itself off again soon after rebooting it is a sign of bad grease in the output stages -- in all probability. Let me explain: The audio output transistors are mounted to a large heatsink which keeps them cool during operation. They are electrically isolated from touching the heatsink by an electrical insulating washer. But, in order to keep them cool and allow for good thermal conductivity of the heat generated by the output transistors the washers are treated with a heat conducting grease. Over time this grease will dry out and lose its heat conductivity ability allowing the temperature of the transistors to rise; as the heat goes up they conduct more current and cause the protection system to activate and shut the set down (in order to avoid damage to the set). That is the most common cause of your symptoms. However, there are several other possibilities, but I give this explanation a 90% probability based on my experience.

Posted on Jun 17, 2007

  • 125 Answers

SOURCE: Yamaha RX-V995 receiver turns on & then powers off 2 seconds late

I suggest you run self diag.  press [FM/AM] key + [Input mode] key and press the [power/standby] switch.

ps prt = power supply problem
dc prt = shorted output or leakly cap in channel
tmp prt means to hot on heatsink

you'll likely have to measure the resistances of the output FETs to find a short, 

Posted on Feb 03, 2009

  • 127 Answers

SOURCE: Yamaha rx-v456 av receiver, shut down with optica cable

Does it work without PS3 attached?
When receiver turns off, it is usually due to badly connected/configured speakers. Try powering on the receiver without speakers.

Posted on Mar 02, 2010

  • 1 Answer

SOURCE: Yamaha HTR-5940 won't stay on after thunderstorm

I have the same problem as you but no thunderstorm. Mine happened after I connected speakers with the unit operating and had a speaker wire short at the back of the unit. Got a whiff of smoke and now I have that DSL1U unit clicking same as you. Did anyone suggest a fix?

Posted on Apr 04, 2010

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