XBox issue -- audio during gameplay but no sound....

[echo_machine]

My cousin has offered to give me his XBox -- he has since bought a new one, and says the old one is mine if I can fix it.

So the issue, as he puts it, is that when a game is loaded, he can hear the audio, and even play the game, but the screen is black (as it would normally be for that channel).

What's wrong with it?

[omnedon]

Video cable should be checked first.