I have a Yamaha receiver htr-3065 that just went dead. Was working fine. I was playing iPhone thru USB port as I had hundreds of times before. I checked all wires, unplugged/plugged all speakers. Hit/held STRAIGHT, turned on and off button, still nothing. Any idea? AND, if i have to buy new receiver, can it work with woofer/speakers that came with initial Yamaha receiver?

SOURCE: my yamaha htr 6050

Make sure you speakers are turned on on the receiver,

SOURCE: Playstation 3 audio connection into Yamaha HTR-6040 AV Receiver

Solved problem with Yamaha HTR-6040 AV Receiver. My daughter had inadvertently changed the program to "Direct Stereo" mode which allows sources to bypass the decoders and DSP processors so you can listen to 2-Channel PCM and Analog sources. Nothing to decode digital audio in this setting!

SOURCE: Yamaha HTR-6130 Front right and left speakers with no sound

As simple as this sounds, try hitting the speaker a/b button on the front of the unit, next to the headphone jack. I had the same problem, and was about to package the whole thing back up and go back to Best Buy when I hit this button and then the audio test worked.

SOURCE: Yamaha RX-V1400 receiver powers off, in case it becomes louder

Hey, yeah that can be frustrating.

When you turn it up do you hear the relay or a clicking sound, then you turn it on and it comes back below the +2db?

Try unplugging All the speaker wires from the unit. Turn on the unit and listen for the click.
after the click, turn it up past the 2+ db mark and see if you hear it click or shut down. If it did not click off, then suspect a shorted crossover on one of your speakers.
2nd test is to plug in One speaker, and test it at high volume, it will not harm it. If it shuts off disconnect that speaker and try another. Only one at a time.
If it works at high volume, you need to isolate one of your speakers and i bet it has a shorted crossover that has been cooked. P.S. If one is bad, suspect they will fail at a later date.
If they all fail, use a friends speaker and try it before sending it to a repair shop.

P.S. i found one on ebay i think you can get for under $100 bucks in the box.

http://cgi.ebay.com/Yamaha-RX-V1400-7-1-THX-Select-Receiver-MINT-Condition_W0QQitemZ330311512027QQcmdZViewItemQQptZReceivers_Tuners?hash=item330311512027&_trksid=p3286.c0.m14&_trkparms=72%3A570|66%3A2|65%3A12|39%3A2|240%3A1318

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SOURCE: YAMAHA HTR 5560 KEEPS TURNING OFF

sounds like you have the polairity reversed on the speakers
and yes it does make a difference
check polairity also make sure unit is well ventelated
you wouldnt use your compouter if it was inside a card board box
so make sure the reciever can breath also
recievers get too hot and they start blowing chips off the board