If the sound is poor
Make sure the headset connector and the headset jack on your controller are free from dirt and debris, which may interfere with sound transmission. More importantly, ask your fellow gamers and conversants to check their connectors, as the poor sound you hear may well originate from someone else’s headset, and not yours.
Earpiece Emits No Sound
Make sure the headset connector is plugged in securely. Try adjusting the volume using the volume control on the headset connector.
Others Can’t Hear You
Make sure the headset connector is plugged in securely and that your headset isn’t muted. Make sure that voice isn’t muted in the Xbox Guide. Check your game manual to determine whether you need to push a button while speaking.
Chat Doesn’t Work
Make sure the headset connector is plugged in securely. Check the mute button on the headset connector to make sure the microphone is on.
Other Problems
For audio/video problems, see Troubleshoot Audio/Video Connections.
It really is not much you can do, but it’s worth trying all these before deciding that your Xbox 360 headset is broken. Hopefully it’s not. Happy gaming! Oh, and if you have other problems with your console, make sure you read our other Xbox 360 guides and tutorials.