Both new and old computers can suffer from what is called "coil whine," a high-pitched noise that comes from the computer. It is easy to conclude that the noise is a sign of a major computer malfunction or that something is broken, loose, or about to explode.
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Fortunately, coil whine is normal behavior. When you hear a high-pitched noise coming from your computer, there is no reason to assume that your computer is broken, that your hard drive is about to die, or anything like that.
In fact, this high-pitched noise is nothing more than an annoyance. If you can tolerate the noise, there is nothing you need to do about it. However, there are a number of things you can do to reduce or eliminate the whine of the coil if it is too much for you.
Coil whine is a high pitched sound that some devices inside a computer case can produce under certain conditions. This hissing or squeaking is similar to a dull, boiling teapot sound, only usually much softer.
