Dell Precision Workstation 450 User Manual page 125

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Microprocessor Airflow Shroud
Dell Precision™ Workstations 450 and 650 User's Guide
Removing the Microprocessor Airflow Shroud
Installing the Microprocessor Airflow Shroud
Removing the Microprocessor Airflow Shroud
CAUTION: Before you perform this procedure, follow the safety instructions in the System Information Guide.
1. Shut down the computer through the Start menu.
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your computer, turn them off now.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.
3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from electrical outlets, and then press the power button to ground the system board.
5. If you have installed a padlock through the padlock ring on the back panel, remove the padlock.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
6. Open the computer cover.
7. Ground yourself by touching an unpainted metal surface on the computer, such as the metal at the back of the computer, before touching anything
inside your computer.
While you work, periodically touch an unpainted metal surface on the computer to dissipate any static electricity that might harm internal components.
8. Press down and back on the indentations at the top corners of the shroud.
The top anchor tabs disengage from the anchor slots.
9. Lift the airflow shroud out of the chassis.