follow these steps to install the new fan assembly:

    step 1 hold the fan assembly with the fans facing to the right.

    step 2 place the fan assembly into the fan assembly bay so it rests on the chassis, and then lift the fan assembly up slightly, aligning the top and bottom guides.

    step 3 slide the fan assembly into the chassis until the two captive installation screws make contact with the chassis.

    step 4 using a screwdriver, tighten the two captive installation screws by turning them clockwise.