RX-V665 Yamaha reciever has been working great. Use it for surround sound and outside, zone two speakers. Recently started turning off during movies. I run blu-ray through receiver. When playing Star Wars receiver turns off w/first big music scene.

The connections should tell you that. If it has sockets for two sets of speakers and two inputs for the sound then it will be a stereo model.
What you can do to test the system is to disconnect the speaker connections to the receiver and use a 1.5 volt battery connected across each speaker cable end. For only a brief time. At the other end you should hear the speaker pop. I suspect you will need two people to do this. Make certain the volume control unit is on full.
If you don't hear the sound of the pop the cable is either faulty or disconnected somewhere.

The signal that comes from most tv's via the optical output is a stereo signal only. That is what your receiver is reading. You would have to manually set your receiver to decode the signal into surround,.

Look in the speaker setup menu. The zone 2 speakers usually default to surround back, and you must go into the setup menu and tell it you want to use zone 2.

Check to make sure your wires aren't crossing on your speakers or if any of them are loose. Could easily be the cause for knocking out your speakers. That's the easy fix. Other than that it sounds like a computer issue. I'd take it back to where I got it from if it was me and it had only been two weeks.
I am kind of curious, though. Why aren't you using all seven channels? You really shouldn't leave channels open like that.

After 6.5 hours, I am now listening to music outside on my patio using my rxv-1600!
Connect your speakers to the Presence Zone 2(3) output on back. Then power up amp and select zone 2 on front of amp. Nothing will happen, because as I found out, you must route an input to zone 2 or 3. Which is cool, because you can listen to something outside that is different from your inside.
You select what to route to the zone by pressing Zone Control button, just right of zone 2 and 3 button. While you see red zone light blinking, rotate input select knob to prefered input, i.e. radio/cd/aux/etc... also, you can adjust volume by pressing zone control and turning up the volume knob, only while ZONE light is blinking.
hope that helps, i know i was frustrated figuring that out!

The volume keys should be working by default, but you may have volume punch through turned on (meaning the remote is sending signals for TV or CABLE volume function no matter what mode you are actually on). To unlock volume control for AUX mode, do the following:
1. Press and release AUX
2. Press and hold SETUP until the remote blinks twice
3. Type 993
4. Press and release VOL-
The remote should blink four times to confirm unlock.

Start by using an old test speaker and connect it directly to the right surround output with a short wire and monitor it.

If it sems to work with no issues, you either have a bad connection at receiver or speaker, or a break in the speaker wire somewhere.

If you have the same problem with the test speaker, you have a rgt. rear output issue in the receiver and it needs repair.

Hope this helps

Hello sounds like you want to take the low level zone 2 output and run it to the PRE AMP in?

If that is correct the onboard amplifier will power your speakers but will no longer provide sound for your main channel as you are removing the "loop" which send the front L & R signal to the amp.

Your best bet is to find an inexpensive secondary amplifier.

Sonance makes a sonamp 260 or 260x3. These are available on ebay for under $100 and work great for multiroom applications.
A 260x3 would give you 3 speaker outputs allowing you to run not only to your patio but also to two other locations and includes a switch to turn each zone on/ off.

Hope that helps

I would check your center speaker wiring and setting. Then switch to a different audio setting (pro logic, theater...)

Thats because if you look in the owner's manual, it declares the fact that it will only broadcast sound from hdmi to monitor not speakers. For sound out of speakers need to connect additional audio cable.