Help: Constant buzzing - not fan
I'm new and in desperate need of insights. I have a HP Compaq Presario 2500 laptop and about 2 months ago it began to make a constant buzz sound. It will buzz in 1 second intervals as long as it is on (hibernation as well.) It isn't coming from the speakers or the fan. When I restart I'm usually granted a 5 minute period of no buzzing before it starts.
I didn't buy the warranty, so i've avoided taking it in for repair. But the noise is driving me crazy!
Possible triggers include the installation of additional memory?! Otherwise I don't know what could be causing the noise.