Lately I’ll notice my monitor is making a really high pitched noise, kind of like a TV. When I jiggle it, the noise may change pitch or eventually stop. I’ve heard this happening with several monitors. Anyone know what cuases it?
Sounds to me like a loose winding in the flyback transformer or the horizontal deflection coil. The horizontal deflection coil on a TV or monitor are modulated at rather high frequencies, and a loose coil will vibrate at this frequency, possibly causing it to buzz annoyingly. Jiggling, whacking, tossing, dropping, or otherwise abusing the monitor will often jar the loose winding into place for the time being, providing respite from the whine.
I’m sensitive to high frequencies and I’ve been known to get strange looks in computer labs for going around and whacking the hell out of monitors which are buzzing at frequencies that most people can’t hear.
Try changing your monitor resolution, especially if you have a multisync monitor. This changes the horizontal scan rate and thus the frequency at which the winding wiggles. With luck you’ll find a horizontal scan rate that vibrates at a frequency you can’t hear.
RUN!
RUUUUUUUUUUUUUUUUUNNNNN!!!
Yeah, that’s the flyback or a transformer whistling. Some people can’t hear it because it’s above their highest audible frequency. I heard a story about how a group of secretaries were always complaining to the bosses about their monitors high pitched sound, but the bosses couldn’t hear it. Of course men tend to lose their high pitched hearing as they age, so the older boss couldn’t hear it and the young women (with perfect hearing) were being driven nuts by the sound.
I hate that F$#@%n noise, Keep pounding that monitor till it stops or breaks