1. Inorder to replace fix or install your new Lenovo 45N2973 laptop fan and heatsink, you will need to open up your laptop. You can do this by removing the screws from the bottom of the laptop.
2. Once the screws have been removed from the bottom of your laptop, you can now remove the keyboard and plastic bezels from your Lenovo 45N2973 laptop.
3. You will see your Lenovo 45N2973 Fan and Heat Skin exposed.
4. Use a screw drivers and remove the screws from you Lenovo 45N2973 HeatSin Fan.
5. Before reinstalling the new Lenovo 45N2973 Fan onto your laptop, you can clean the Lenovo 45N2973 Fan. To clean your Fan and Heatsink, use a can of air and blow out any dirk from your Lenovo 45N2973 Fan. You can also use a paint brush to clean out the dirt from the hard to get areas. Somtimes cleaning your Lenovo 45N2973 laptop fan will actually repair it. Dirt can cause the Lenovo 45N2973 Laptop Fan to make noise and even stop spinning properly.