Dell OptiPlex 7440 Owner's Manual page 31

m. processor fan
3. Perform the following steps as shown in the illustration:
a. Disconnect the optical-drive cable and hard-drive cable from the connectors on the system
board [1].
b. Disconnect the touch pad cable from the connector on the system board [2].
c. Unthread the cable from the retention clips of the computer [3].
4. Perform the following steps as shown in the illustration:
a. Remove the screws that secure the optical-drive cable and hard-drive cable to the system [1].
b. Disconnect the optical-drive cable and hard-drive cable [2].
5. Disconnect all the cables that are connected to the system board.
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