Why does digital audio cut out?

Question

My home theater receiver only has 1 digital input, so I run all of my devices audio to the TV (PS3 via HDMI, HDTV via component, and Wii through composite), and run the TV's digital audio output (coaxial) to the theater receiver. Whenever I try to listen to the TV's output through the home theater system, every couple of minutes, the audio will cut out for a few seconds, EXCEPT when I play a game on the PS3. If I put a DVD in the PS3, it cuts out just like the rest of the stuff. (I havent tried a BluRay movie disc in the PS3 yet).

Answer 1

Occasional sound drop-outs happen when you use the wrong RCA cable for the coaxial-digital connection.

Get a Video cable (made with the proper 75 ohm coax) and hook this between the TV and the AV Receiver.  See if this solves the problem.

If you are using a cable with red or white RCA plugs - the coax is a c**p-shoot as to how it handles the digital signal.

Answer 2

I'm thinking it may be a signal strength problem. Different devices often have different signal strengths and games may have just a bit more strength. How long is the cable between the TV and the receiver, and what is the length between the PS3 and the TV? What is curious and the reason I think it may be signal strength is that it works under some conditions, i.e. games. If the signal is slightly stronger with a game than anything else that would account for it. Do any of the devices work if you hook them up directly? That would tell you if it's the TV that is cutting down the signal strength.