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

NOTICE: For proper cooling and airflow, do not operate the server with the cover removed for more than four minutes. Do not leave the chassis cover open or a system fan removed any longer than necessary; system cooling could be reduced.

NOTICE: The server comes with a removable top cover that allows the system fans to be hot-plugged and other system components to be serviced. Except for components described in this chapter, all servicing must be done by a qualified service technician.

NOTICE: Provide ElectroStatic Discharge (ESD) protection at all times by wearing an antistatic wrist strap attached to the any unpainted chassis surface (chassis ground) when handling electronic components.

Removing the Top Cover

To upgrade or troubleshoot the system, remove the system cover to gain access to internal components.

1Unless you are installing a hot-plug component such as a cooling fan or power supply, remove power from the system and attached peripherals, and disconnect the system from the electrical outlet and peripherals.

2To remove the system cover, turn the latch release lock counter-clockwise to the unlocked position. See Figure 3-2.

3Lift the latch on top of the system. The cover will slide back as you lift the latch. See Figure 3-2.

4Grasp the cover on both sides and carefully lift the cover away from the system.

Installing the Top Cover

1Lift up the latch on the cover.

2Place the cover on top of the system and offset the cover slightly back so that it clears the chassis J hooks and lays flush on the system chassis. See Figure 3-2.

3Push down the latch to lever the cover into the closed position.

4Rotate the latch release lock in a clockwise direction to secure the cover.

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Installing System Components

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Dell R900 manual Removing the Top Cover, Installing the Top Cover