142 Installing System Components3 Slide the backplane downward until the two blue retention latches snapinto place.4 Connect the SAS data and power cables to the SAS backplane.5 Reconnect the power cable to the control panel board. See Figure 3-29.6 Install the hard drives in their original locations.7 Close the system. See "Closing the System" on page 83.Power Distribution BoardThe power distribution board is located on your system directly behind thepower supply fan modules. This feature provides additional cooling to thepower supplies through the power distribution shroud that routes airflow tothe power supplies. See Figure 3-31.Removing 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 isnot covered by your warranty. Read and follow the safety instructions thatcame with the product.1 Remove the power supplies from the system. See "Removing a RedundantPower Supply" on page 95.2 Locate the power distribution shroud and lift it out. See Figure 3-1.3 Disconnect power distribution cables from the system board (see "SystemBoard" on page 144) and disconnect the fan cable connectors. See Figure 3-31.4 Remove the two screws securing the power distribution board to thechassis. See Figure 3-31.5 Slide the power distribution board away from the standoffs, and then liftthe board out. See Figure 3-31.
