Rx-v667 won't power on

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.

SOURCE: Yamaha RX-V850 receiver

how can i hook a subwoofer into yamaha RX-V850

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, 

SOURCE: Yamaha YHT-390 Home Theater System

Hi,

Here is a link to your receiver, at the bottom there should be a download link, The receiver you listed isn't there but maybe the few that are there can help. Hope this will be some help!

http://www.yamaha.com/yec/products/productdetail.html?CNTID=567702&CTID=5000800&RLTID=1505&DETYP=RELATION

SOURCE: My Yamaha RX-V765 receiver has the Yamaha bluetooth but no work

Macs aren't compatible with everything.
So the reason it didnt find it was cause its not compatible. I mean thats my conclusions and it might be right.

Good luck
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