Samsung HT-AS720ST Theater System - Answered Questions & Fixed issues

Make sure the wiring is making clean connections between the speakers and the unit.

Disconnect all wires to the receiver and speakers and connect them back again. The receiver should be on a surround or 5.1 mode

Hissing is cused by noise interference which is usually bad cableing or bad reception of the station or device if wireless then check out your hosehold appliances and start shutting them off one at a time and see if that clears it up. Somethng is tagging along for the ride on the same freq or close to the freq if wireless

http://www.retrevo.com/support/Samsung-HT-AS720-Home-Theater-Systems-manual/id/6333ci454/t/2/
Page 10 discusses speaker connection.

Disconnect everything but the speakers and evaluate the buzz. It may be coming from external hardware or loosely connected analog cables.

Sometime juts rotating the ac plug on one device eliminates the ground loop buzz.

Do you have any multichannel digital inputs connected?

http://www.retrevo.com/support/Samsung-HT-AS720-Home-Theater-Systems-manual/id/6333ci454/t/2/

I had this same issue about a year after I bought the product. Sent it back under warranty and about a year later, I have the exact same issue again. Never buying samsung receivers again.

I have the same problem. HDMI connection and the sound just stops. Very frustrating

IF it is out of warranty, you can open it up and look for loose connectors on the boards. It may be a poor connection that is visible. Otherwise it may be a connection problem that is hidden/internal. Bad solder connection on the board/speaker tabs, etc.

The problem is caused by the PULSUS PS9829B digital audio processor. We ordered it in from a Samsung authorized service centre.
Problem is now solved. Unit works perfectly. If you have never tried working with surface-mount ICs I would skip it if I were you. This IC has over 100 pins on it. However the part is available from Samsung. Print this comment and take it to your locat service centre along with your receiver. They should be able to repair the board unless they are wussies and cannot do surface-mount work.

our started cracking and popping this morning. It seems from all the posts that it is always the right front speaker. With that kind of trend it can be traced back to mfg. Is there a recall, are they covering the cost?

take it apart they have aglass fuse inside

Check all of your connections, and make sure all cords are firmly connected.
Make sure if the subwoofer has a power switch, it is on, and if not, that it is likely to be faulty.

After trying several ways, we decided the best picture was to run the blue ray (out) directly to the TV (in) with an HDMI and another HDMI from the sat. box(out) to TV(in), then optical audio from TV (out) to receiver (in). This way you don't have to change channels on the reciever when switching from TV to DVD. Remember that HDMI is one cable that supports audio and video. If you are using all Samsung products and want to use one remote, using the Anynet feature, I think it has to be connected with an HDMI. I'm going to try connecting an HDMI too from the reciever to the TV to see if this feature will work. It does with the Blue Ray.

On the rear of your TV connect, with a phono/RCA cable to the Audio R + L sockets, connect the other ends to your Yamaha using the TV in sockets. See photos attached Hope that helps. HDMI is for video unless the extra pins are added for audio.

See service manual. There are no fuse in it. Service Manual: SA-WX900 ' PDF ' Loudspeaker ' Electronics (scribd.com)

See page no 65 troubleshooting in user manual YPU4J-CANADA-ENGLISH0.0_0610.indd (samsung.com)

See following link, it may resolve your issue My MP3 Player Is Locked Up (Frozen). ' Samsung Africa

Normally makers don't play ball between each other. Yes if it was a Samsung Television and a Samsung Receiver A/V System. Or if you have something like a Cable Box or Satellite System that is made to interact with other makes. Or if it is a Universal Remote. I think you were just lucky that it happened to use the same frequency. Look in the manual for a scan command. https://www.google.com/search?q=Connect+Samsung+OLED+S90+remote+to+Yamaha+RX-V361+via+optical ..

Check battery. It may require replacement.

Check the battery. It may require replacement.