I have a HP pavillion 6630 and when the pc is shutdown the cpu fan won't stop but it will if the power cord is plugged in. Also im not in sleep or hibernate mode!!!
does the cpu fan EVER turn off? because people are using delays for the fans, sorta like how the radiator fan in your car sometimes goes even though you've turned off the car....
I had similar problem with my computer. My cpu fan and one extra fan kept spinning after I had turned off my computer. This lasted about one week and then the computer didn't start anymore. All the problems were caused by my eight years old power supply (Seasonic SS-200GPX) wich had broken. After new power supply everything worked smoothly.
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