i have an old PC that i bought from best buy a few years ago, and when i would turn it on, at about the time it should post i'd hear a long BEEEEEEEEEEEEEEEEP. if i dont turn the PC off it'll do it over n over. i used to be able to turn it on and off a couple times and eventually it'd boot up properly (yes i know that's not good for the PC). i always left it on so i basically ignored the problem. i sold it to my friend however and he went to turn it on and it does the long beep, and no matter how many times we turn it off and on, it wont come on. so looks like we gotta fix it. sounds like it's coming from somewhere where the expansion slots are. any ideas as to what it could be?