When using component cable (HD AV) to connect the Xbox 360 and TV, an audio silent or sound distortion, usually because of failure caused by the following reasons:

1. component cable is not connected properly.
2. component cable is faulty or damaged.
3. Xbox dashboard audio settings are incorrect.

You can try the following solutions:

First, test a few more discs to see if there is only a game or movie can not say anything, or all of the games can not say anything. If only an isolated phenomenon, can go to Microsoft's official website to the relevant solutions;

Then check your xbox 360 av cable andaudio settings, make sure you choose to use "digital" or "analog audio sound";

Check and check your line is now used by the component or whether it is compatible with Microsoft's allowed;

Make sure you are properly connected to the xbox 360 and the speaker. Check the speaker is turned on, cable is connected. Note that this cable has two red connectors, a red section (take video), and the other is pure red (audio connection). Solid red line is the right audio connectors, pure white is the left audio connector cable. Some cheap xbox 360 av cable also has good quality.

If you can only hear mono sound or only a little input, please check the audio settings to see if it chose to "Digital Stereo", "Dolby Digital 5.1" or "WMA Pro DolbyDigital".

Related articles:

http://www.klintorth.com/forums/entry.php/136-Car-Power-Charger-for-Sony-PSP
http://www.ctvnetwork.org/network/pg/blog/Naoma/read/115293/universal-usb-travel-charger-for-all-sony-psp
http://acuinet.com/pg/blog/chromik/read/45130/composite-audio-video-av-cable-for-microsoft-xbox-360

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