I cant seem to get the speakers behind us to work. We have gone through the speaker set up and done what it says, they work on the test but not when we play a dvd/aux etc.
On the display it only has the L & R speakers lit up....the subwoofer and middle speaker work ok but not the other two.
Ive done the factory reset thingo, they wont work and it still only has the L&R on screen .
My 18month old has been pressing a few buttons......maybe he's done something.
Can anyone help. Please
PS My hubby assures me everything is plugged in correctly.
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from the problem description, it sounds like a wiring/setup problem with the speakers. check to make sure you are only using the main 'a' front r & l speaker connectors. if you select speaker set a + b on the front, you will not have the rear channels. please see the speaker connection guidelines in the manual on page 13-15. make sure the audessey mike and/or headphones are not plugged in when trying to use the speaker set up function.
But if 5 speaker setup have your front left and right speakers on the appropriate side of the television, your center speaker in the middle of the tv, Either mounted on the wall or underneath or on the shelf, try to have the center speaker set back from the front speakers. Subwoofer usually I mount behind the entertainment center. Your rear right and left speakers optimum position is behind you on the left and right.
If its a 7 speaker setup everything is the same except side right and left speakers go in the middle somewhere between the right and left front and rear speakers
I will make a example the the cursors  Speaker *TV LF CT and TV* RF Subwoofer behind tv SL SR LR RR
Well if you can hear RS then take it to your local electronics repair store if warranty has expired.
If you cant hear RS aswell then you might not have the right number of speaker's or speakers setup right. if you have 7.1 then you will have LS and RS speakers if it is 5.1 setup then then rear speaks have an option on most to be a rear (behind speakers) or rear (side speakers
check all your speaker wires probably they are broken.if they check good then you will have to get a tech to look at your set it could be your set output ic or transistor gone bad and need to be replaced.and if it is a old set buy a new one probably it wont worth the while to repair it.
Best thing to do is to put the unit in 5 channel or 7 channel mode. That will send left ch information to the front left and rear left speakers ( both will get the same information). Ditto with the right channel. The center channel will get centre channel information.
If all the speakers work, go out and rent TOP GUN. ( yes its old), BUT there are a few extreme scenes , one of which is the elevator scene, where the camera changes perspective and suddenly you hear the elevator doors close BEHIND you through only the surround speakers ( have the unit in surround mode....NOT 5 or 7 ch mode ). If this works ok, then you have no problems.
Remember, surround sound only produces information in the rear channels when the information is there. To check out the digital and DTS decoders, get an action flick. If you can, get a remote too, because that will unlock many features about the receiver that you cant get to with the front panel controls. Also go to yamaha and download the owners manual ( its free !!).....that should get you going.....
Another way to solve this rear speakers problems is to go to the equalizer and have the system recognizes the sound coming out of all speakers. The AVR 745 comes with a microphone on the stick, using that to run the manual equalizer. It is the manual equalizer will set the rear speakers.