Connecting Airport Express to my Onkyo Receiver

The manual explains it.

http://www.retrevo.com/support/Onkyo-TX-DS939-Receivers-manual/id/365ag201/t/2/

use your airport utility, it will guide you thour the setuo, remember, gate way or bridge. you need both, but you need to choice witch one.

Unplug the AirPort Express from the power outlet and press and hold the reset button. While still holding down the reset button, plug the device into a power outlet. Hold down the reset button until you see the light flash green four times. Let go of the button and the device will reset itself. Wait the requisite 45 seconds and configure it with the AirPort Express Assistant or AirPort Admin Utility.
This performs a factory reset.

Hi,
Welcome to Fixya community.

Please try download and Install MacTube Player to play Youtube video or music... Let me know the result please...

Also to play the music in stereo receiver please follow below steps.

1. Plug in the Apple AirPort Express into a power outlet near the stereo. Connect an audio cable from the audio port on the AirPort Express to the audio in port on your stereo. If your stereo has a different sized audio port than the 3.5 mm one on the AirPort Express, you will need to use an adapter to connect it.
2. Plug in an ethernet cable from the AirPort Express to your computer or wireless router for a wired connection. For a wireless connection, connect the AirPort Express to your existing home network, or use a computer with a wireless network adapter to connect directly to the AirPort Express.
3. Connect to the AirPort Express with your computer as directed in the manual to run the setup with the AirPort utility. Follow the instructions on the screen.
4. Open iTunes and play the music to your stereo. There should be a pop up in the lower right corner after you run the Airport utility.

Let me know how far you could able to reach in a result. Our expert friends are here anytime to solve your issue.

Thanks once again for joining us.

Have a good day.

Reset your Internet connection

connect a ethernet cable to it. find it in the utility and reset it.

Login to your airport express using Apple's airport utilities (either in it's current configuration or after resetting it).

Using the airport utility do not choose manual setup, just select continue.

Adjust (as required) the airport express station name and password and select continue.

Select "I have a wireless network and I want to add AirPort Express or replace an existing device on my network and select continue.

Select I want Airport Express to wireless join my current network and select continue.

Choose if you want to extent the rance of your network or just join the network and select continue.

Choose the network you wish to join... etc etc etc....

You should be fine.

I have to ask the obvoius, did you get the manual, have you used the onscreen menu to set up the speakers, you can calibrate the speaker levels on the TV screen if you use the S video or RCA vidoe connection .have you turned off tape monitor?

thats cause your patch cable is mono get a stereo 3 ring connector.

What do you mean by a jumper plug. Are you referring to the preamp jumper plugs?