Quote: Originally Posted by natturner
There's this high pitch sound coming from my computer. You can hear it if you're within like 6 or 7 feet. I think it's coming from the cooling fan. The weird thing I noticed is that the sound goes away if my ethernet cable is not plugged in.
Any ideas how to fix it?
It would really help to know your computer specs... makes a BIG difference.
laptop, desktop, make etc...
Not sure if it's fan related because of the ethernet cable oddity.
-Some possible causes... ground differential between the cable/dsl modem and the computer. Is the power supply for the modem plugged into the same outlet the computer is plugged into? If not, try that first. As a test you could try a ground lift (2 to 3 prong connector) on the modem's power supply.
-It's also possible the PC's audio system is picking up motherboard noise generated by the data cable/internal circuitry. Mute the PC's master audio to test.
-If a desktop, does it have the PC speaker hooked up, not the audio system speakers but the one that beeps?
-Last, it's also possible a for a component on the motherboard to make this sound, I had an old synthesizer with loose windings on a coil that made a constant high pitched sound as it sat there and vibrated.