Dell Inspiron 580s (Late 2009) - Manual (Page 25)

Removing the Chassis Fan
1. Follow the procedures in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
3. Disconnect the chassis fan cable from the system board connector (see System Board Components ).
4. Remove the screw that secures the chassis fan to the chassis.
5. Slide the chassis fan towards the front of the computer and lift it out.
Replacing the Chassis Fan
1. Follow the procedures in Before You Begin .
2. Align the top and the bottom tabs on the chassis fan with the projections in the chassis, and slide the chassis fan towards the back of the computer.
CAUTION: Do not touch the fan blades when you are removing the chassis fan. This could damage the fan.
1 screw 2 chassis fan