Dell 840 manual Installing the Front System Fan, Removing the Back System Fan

4Squeeze the two release tabs on the top of the fan assembly and lift the fan assembly away from the system. See Figure 3-15.

Installing the Front System Fan

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

1Insert the fan power cable through the cable routing hole in the expansion-card guide bracket. See Figure 3-15.

2Align the fan assembly with the slots in the chassis and lower the assembly into the chassis. See Figure 3-15.

3Pull the fan cable through the routing hole in the expansion-card guide bracket. See Figure 3-15.

4Connect the fan cable connector to the FRONT_FAN connector on the system board.

5Close the system. See "Connecting Drives" on page 47.

6Stand the system upright.

7Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.

Removing the Back System Fan

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

1Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.

2Open the system. See "Opening the System" on page 43.

3Remove the cooling shroud. See "Removing the Cooling Shroud" on page 64.

4Disconnect the fan cable from the BACK_FAN connector on the system board. To identify system board connectors, see "System Board Connectors" on page 118.

5Pull the release tab on the fan assembly away from the back panel and slide the fan assembly about 0.63 cm (0.25 inch) toward the expansion-card slots. See Figure 3-16.

6Pull the fan assembly forward and lift the assembly out of the system. See Figure 3-16.

Installing System Components

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