To replace a laptop fan, use the following steps:

1. Turn off and unplug your laptop.
2. Remove all screws from the laptop’s bottom panel.
3. Carefully remove the panel.
4. Identify and remove the fan.
5. Clean away any accumulated dust from the fan, on the laptop’s motherboard.
6. Secure the panel to the laptop’s bottom.
7. Plug in and turn on the laptop.