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7Install the heat sink:

a Slide one end of the heat sink under the retention tab.

b Pull out the other retention tab and lower the heat sink until it fits securely in the base.

NOTICE: Ensure the heat sink is correctly seated and secure.

8 Reinstall the retention module clips.

9 Lower the airflow shroud over the heat sink.

10Reconnect the cooling fan power cable to the REAR FAN1 connector (see "System Board Components" on page 75) on the system board.

11Reconnect the power cable to the 12V PWR connector (see "System Board Components" on page 75) on the system board.

12Close the computer cover.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

13Connect your computer and devices to

electrical outlets, and turn them on.

Front Panel

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer’s electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing the Front Panel

1Follow the procedures in "Before You Begin" on page 67.

2Disconnect and remove all disk drives (for more information, see "Drives" on page 88).

3Release the front panel by pressing each of the seven front-panel release tabs.

108

Removing and Installing Parts

Page 108
Image 108
Dell WHL, U7021 manual Removing the Front Panel, 108