Loud buzz and a red light! Hot, too.

My AE started sending a loud buzz through its audio output. When I unplugged the cable, there was a red light shining from the connector hole. The darn thing was pretty hot, too, although I can't really say it was warmer than usual. Unplugging it for a while causes it to work again (the red light goes away).
Is it frying itself to death?
Any ideas?

The warmth of the Airport Express, and the "red light shining from the connector hole" which is the optical digital output, are not things I would be overly concerned about. The "loud buzz" is of course not normal. If this "loud buzz" becomes a recurring problem (and you eliminate a faulty cable or sound system as a source of the buzz) and your Airport Express is still under warranty, I would recommend you get it replaced.

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