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What you are hearing is the 15,734 hertz oscillator frequency ringing in one of the coils or coming from the high voltage transformer. (Sounds like an RCA set, by the way). If it's bothering you to the point of distraction you may want to have it serviced. This is the time when an extended warranty may come in handy. You can either ask the technician to track it down to the actual part causing the noise, or the technician may, at his option, just replace the entire circuit board, which could be expensive.

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15y ago
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17y ago

If the TV in question is a traditional "tube", it is likely a sign that your tube is on its way out. Now's a great time and opportunity to move into HDTV!

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Q: What would cause your television to make a high-pitched noise?
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