Installing System Components 123Replacing the Power Distribution BoardCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.1 Unpack the new power distribution board assembly.2 Align the power distribution board with the tabs on the chassis and slide itin place until the blue tab snaps over the edge of the board. SeeFigure 3-25.3 Install the three screws that secure the power distribution board to thechassis. See Figure 3-25.4 Connect the power distribution cables to the system board (see "SystemBoard" on page 124) and fan cable to the power distribution board asshown in Figure 3-25.5 Align the support bracket over the Power Distribution board and secure inplace with the screw.6 Install the internal hard-drive bay. See "Installing an Internal Hard DriveBay" on page 73.7 Install the power supplies in the system. See "Installing a Power Supply" onpage 79.8 Replace the expansion-card riser. See "Installing an Expansion-Card Riser"on page 94.9 Replace the expansion cards. See "Installing an Expansion Card" onpage 90.10 Close the system. See "Closing the System" on page 65.11 Reconnect the system to its electrical outlet and turn the system on,including any attached peripherals.
