Hmmmm... Hardware is not my forte. I can mention it to some of our computer guys, but my gut is that they will tell me that it could be a number of things. What model of PC do you have? I'd start thinking about getting an estimate to repair it, and you also might want to start looking at deals for PC's in your local paper. We got an amazing deal on a Compaq at Staples. It has a Celeron Processor, but after rebates we spent under $400 and got a new printer. Also, you can just buy a tower on line if your monitor and keyboard are ok.
I wish I could be of more help, but I'll ask!
"Ladies, if you want to tell a guy something we need to hear it three times. The first time we didn't hear you and the second time we didn't think you mean it!" Dennis Miller"