
My computer is making a horrible new sound. It sounds like a fan, so i took off the cover and blew out all the old cobwebs and dust from the fans, thinking that would help.
At first I thought it was my video card, but when I got the sound again after spraying, I took a flashlight with the cover off, and the sound is comming from
that little box that the power plug plugs into. there is a fan there, I'm pretty sure THATS the culprit. So, what do I do? What is it? Can I fix it? is it expensive?

Dell xps 400
pentium d processor 830
gforce 6800
2gbddr sdram 533 mhz
250gb serial ata hard drive 7200rpm
*is this the correct info you need?*
Thanks in advance for any help.
