What does it mean when your computer tower speaker makes a schrill & constant noise?
Probably a fan. Try to isolate the noise if you can. You may have to remove the side cover and blow the dust out of it if it's dirty. It could also be the fan in the power supply and possibly even a hard drive beginning to fail. Try cleaning it out first with a can of compressed air. The case fan can be lubricated, the psu fan, probably not.
The tower speaker you are talking about, Is it a peizo on the motherboard or an audio speaker that provides normal audio output? Are you certain the noise is coming from that? Do you have separate speakers connected to an Audio output jack? Goin' Fishin' (Some day)
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