Hi, I have a well-behaving Zbook G2 but suddenly the fan is now on at moderate speed at all times. I have cleaned the fan/fan area (was not very dusty): no change. In the BIOS the fan is not set to be ON when on power supply, and no change was made recently.
The Speccy tool shows :
Sorry, the setting is something like "Fan permanently ON when on power supply", meaning the fan will keep running all the time. If not set to ON, the fan runs when needed. This notebook does not have the necessary hardware for Coolsense.
OK, after some more intensive cleaning, opening back and vacuuming all visible holes and vents again, problem is solved. The Speccy motherboard temp. reading is now alive (variable) again, generally around 45 degrees C instead of fixed 85 degrees. And fan is quiet again most of the time.