My Laptop is making a really quiet, really high pitched screetching noise and it is doing my head in, my ears feel like they are bleeding.

ive tried muting everything and turning the mic off etc but it still does it.

any ideas?

could be a mechanical or electrical component making the noise, not feedback on the speakers.

tried seeing if its louder underneath near the HDD or CPU fan ?

got anything in the Optical Drive ? My DVD/CDRW makes a cuttingly sharp noise when its reading/buring.

power!"!!!

my laptop did that when the power socket was about to die. carefull not to let it overheat imo.

Does it only do it on power? or when on battery as well?

only other thing I can think of, is maybe the internal modem

hardrive fan? My old one did that, had to open it up, give it a clean and found a fin had bent, bent it back a bit and all was well

i get that from a NIC whenever i start copying stuff across the LAN it makes an annoying noise like that

The switchmode supply charging the battery?  My phone charger makes that noise when it is charging or has power going through it, something to do with resonance.

Quote from: Chuck NorrisThe switchmode supply charging the battery?  My phone charger makes that noise when it is charging or has power going through it, something to do with resonance.

I was about to say the same thing, my old Nokia charger used to do this and my MX700 mouse cradle has recently started doing it.

the high pitched screeming is usually from an inverter.  Thats the noise they make but usually theyre encased in something so you cant hear it.

Itll be in the power supply.  Not a lot you can do if the noise is escaping the seal tho.  Most systems that plug into mains and then run at lower DC voltage have one in and they all make this noise.  usually the seal holds and you cant hear it.

Anyone whos ever had case lights in their PC will know the sound all too well.