I've always been running on A/C power but lately my computer loses power for no reason. It's not that it shuts down, but instead it just turns off like it suddenly lost power. I thought maybe my charger was dying so I bought one from HP but that hasn't changed anything. My battery hasn't worked in a really, really long time so I never put it in the laptop anymore. I tried the computer in the outlets in my bedroom and in the library and I got the same results. Sometimes the power shuts off as the computer is booting, other times it lets me get to the home screen and I can play on the computer on a while before it loses power. I always keep my laptop on top of a chill pad. Although I've noticed my fan doesn't turn on when I turn on my computer. Is it suppose to? Also, I think I might have heard a noise from my fan. How can I be sure it's the fan? I have a HP G60 120US. I bought it in 2008. It's running off Windows Vista Service Pack 2.