I have an HP laptop dv9000 with 2 GHz Intel Core 2 processor. I run Speedfan to monitor temps. I noticed that the CPU was suddenly running about 10 degrees C hotter than usual: at 0% CPU usage, temp would get into the 40's, whereas before it would run about 30.
I took apart the computer and cleaned the dirt out of the heat sink.
Now, as soon as I turn on the computer, the fan comes on and runs at a steady high RPM all the time, loud and annoying. And CPU temp is still high, running about 38 degrees at idle when I would expect it to be 29-30.
Is there something wrong with the temp sensor--and if so, where is it? Is it repairable without replacing the motherboard?