NOTE: Use the guide pins on the chassis and the L-shaped keyways on the display board to help you with the display board replacement procedures.

1.Remove the diagnostic panel light guide protective cover from the replacement display board (Figure 6-30).

CAUTION: Do not use the USB connector as a handle to replace the display board. Failure to observe this warning can result in damage to server components.

2.Place the display board onto the guide pins.

3.Use the diagnostic panel light guide as a handle to push the board toward the front of the chassis until it fully seats against the front of the chassis (Figure 6-30).

4.Remove the top two screws from the right side of the bezel. Pull the bezel out from the chassis approximately one half inch so that the display board can clear the locator and power buttons (Figure 6-30).

CAUTION: Do not pull the bezel out from the chassis more than one half inch. Failure to observe this warning can result in damage to server components.

5.Hold the bezel out from the chassis, and simultaneously push the board to the right to plug it into the socket on the interconnect board.

6.Locate the knurled thumbscrew behind the DVD drive that holds the display board in place. Turn the screw clockwise until the board is secured into place (Figure 6-30).

7.Install the diagnostic panel light guide (Figure 6-30).

a.Align the diagnostic panel light guide tabs with the slots on the display board.

b.Push down firmly on the light guide until it seats onto the board.

8.Replace the top two right-side bezel screws (Figure 6-30).

9.Replace the DVD drive. See “Replacing the DVD Drive” (page 203).

10.Reconnect the USB cable into the connector on the display board (Figure 6-30).

11.Replace the air baffle (Figure 6-33).

12.Replace the clear plastic cover.

13.Replace the top cover. See “Replacing the Top Cover” (page 182).

14.If rack installed, slide the server completely into the rack. See “Inserting the Server into the Rack” (page 180).

15.Reconnect the power cables and power on the server. See “Powering On the Server” (page 94).

Removing and Replacing the SAS Backplane Board

Serial-attached SCSI (SAS) is a new, faster version of the industry standard SCSI technology. Although SCSI is a proven technology, its parallel data communication model restricts it from providing the speed and scalability required for modern data transfer and storage. In a parallel data communication environment, multiple devices share one bus; all data travels over the same cable and through the same port.

SAS provides serial, or point-to-point, data transfer. A point-to-point architecture means that each device has its own private bus, cable, and port. This architecture improves the reliability and availability of data, and greatly enhances data transfer rates. Current data transfer rates are

3 Gb/s. Additional features of the SAS technology include:

•Full-duplex capability (all data reads and writes occur simultaneously)

•Automatic device discovery and configuration (each device is assigned a unique SAS address)

246 Removing and Replacing Server Components