Laptop fan problem?!?

Laptop fans are controlled via your compurer BIOS, they work on demand. A lot of times a crude BIOS update will solution AN erratic fan. You should get associate exact oem model replacement for best functionality. Do not rig a laptops cooling system. You could find an inexpensive one on ebay, maybe used, they come near the heat washbasin most of the time. Try installing what belong there, whether it still doens work, you may mortal a burned out devotee circuit, which requires anew MOBO, and anew windows install most of the time.
Nifty Luck