Headset muted

• Disconnect the headset or unplug the headset cable from the bottom of the controller, and then reconnect it firmly to the controller (in the expansion port for a headset or the 3.5-mm port for a 3.5-mm chat headset).

• Make sure the headset is not muted. To do this, check the mute button on the headset controls. (For a headset, the mute button is on the left side of the connector that is plugged into the expansion port of the controller. For a 3.5-mm chat headset, the
  mute button is a slider button on the front of the audio controls that are in the middle of the headset cable.)

I have never run into that problem but their is two ways to mute in party and on headset but they both mute and if its not reading a headset and it works in another controller then it's the controller if not it's the headset

Its either you have a wired headset that has ripped wires meaning you need a new headset or you muted yourself in a party or headset if you have a mute button on the headset.

What kind of headset is it? Most of the headsets have a mute button located either on the headset itself, or the cord connecting it to the controller. Also does he have a chatpad? All of these have buttons that can mute a mic, without him clicking the mute
button in the party.

Sir Lancealot 83.

The microphone is muted, not the headset.

The headset and microphone works on another xbox and controller.

I have tried it on 2 controllers on the bone that is muted.