6Place the replacement board in the chassis in the same orientation as the original board, then replace the four screws you removed in Step 5.

7Reconnect the cables to the board at the same locations and in the same orientations as they were originally connected.

8Replace the power supply.

9Close the case. (See “Closing the case” on page 20.)

10Reconnect the power cord and external peripherals, then turn on the system.

Replacing the fans

The fans are located between the system board and the hot plug drive cage. The fans are not hot-plug capable and you must shut down the system to replace a fan.

To replace a fan:

1Turn off the system and disconnect the power cord and external peripherals.

2Open the case. (See “Opening the case” on page 18 and “Preventing static electricity discharge” on page 17.)

3Unplug the fan cables from the system board.

54Replacing and Adding Internal Devices