My Yamaha RX-V661 shuts off at moderate volumes.

Hi.

Looks like the the unit is locked to region 1.

The Yamaha receiver you listed is region free, therefore I assume you are talking about a different unit, in that case give model please.

If you have the problem with a Yamaha RX-V661, then simply disconnect power cord for ten minutes. And disconnect from power all devices connected to the receiver.
This should reset the system.

Let me know in case it does not work.

Regards.

Get the original Yamaha remote, go to Set menu, manual setup, speaker setup, and look for "extra speaker." it needs to be set to "zone 2." This is off the top of my head, so it should be pretty accurate. Get used to doing this, though, as this amplifier assignment to zone 2 is prone to resetting itself in those Yamahas.

Most likely the plug is ok but the level control for the subwoofer will need to be readjusted in the receiver, If the level cannot be raised making sure your source being used has subwoofer information, then there could be a problem in that circuit.

i have the same problem. i have a rx-v661. i goto the zone 2 settings and try to change the volume and it says VOL FIX. I cannot hear anything out of zone 2. It takes the current volume that is in zone 2, but i cannot hear anything. it has been working fine for at least a year.

unplug the reciever for at least 15 minutes. then replug in all of your speakers making sure there is no bare wire showing. if the reciever doesnt ower on replace the fuse inside(make sure unplugged from wall)

Sounds like the Zone 2 amp was set to external, see below for instructions on setting it back up.
How do I setup Zone 2 on the RX-V661 Using the internal power amp.

Setting the RX-V661 remote control to operate Zone 2
1. Using a ballpoint pen or similar object and press the Code set
button. The Transmit indicator on the remote should flash twice.
2. Using the numerical key pad on the remote and key in 9992, the
Transmit indicator should flash.

You will now need to assign the receivers internal amp for Zone 2.

1. Set the remote control selector to AMP. Selector is on side of remote.
2. Press the Set Menu Button.
3. Arrow down to Manual Setup.
4. Press the Enter button.
5. Arrow to the Sound Menu option and press Enter.
6. In the Sound Menu arrow to Speaker Set and press Enter.
7. Arrow to the EXTRA SP ASSIGN and select ZONE2. This may require using LEFT or RIGHT arrow.
8. Press the Return button to exit out and return to the Manual
Setup.

Sounds like the "crack!" was a capacitor that got fat and blew up.

Go back into zone 2 set up and turn volume fix off then turn up volume for zone 2.
hope this helps.
CABLE GUY.

How close to your video monitor is this rxr? It is not shielded well as far as sync circuits in your TV are concerned. Refer to manual...accordianman

change the impeadence settings of the receiver page 25 of the manual will tell you how.