Join Date: Apr 2006
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Turn on the stereo and turn it up until the whine is clear. Now go to the breaker panel and shut EVERYTHING ELSE OFF.
If the whine goes away, you turn circuits back on one at a time until you find out which one is making the whine, and work on fixing that. If you turn everything else off, and there are no gizmos plugged in outside of the breaker panel, and you're running on DC not on shore power with a converter, etc., then the noise is either coming from your neighbor, or the stereo has a problem internally.
Try again in a different location if you suspect the neighbors.
Once you find out the source of the noise, you can figure out how to best fix it. "Car" stereos aren't expensive these days, new ones with aux inputs for mp3 players and other music sources are common now too. If yours has an internal problem...could be time to replace it.