188 | Installing System ComponentsYou must route these cables properly through the tabs on the chassis toprevent them from being pinched or crimped.6 Connect front panel cables to the fan controller board. See Figure 3-48.You must route these cables properly through the tabs on the chassis toprevent them from being pinched or crimped.7 Replace the screws that secure the hard-drive cage. See Figure 3-42.8 Close the system, see "Closing the System" on page 174.9 Replace the hard drives. See "Installing a Hard Drive Into a Hard-DriveCarrier" on page 109.10 Reconnect the system to its electrical outlet and turn on the system,including any attached peripherals.Power Distribution BoardsRemoving a Power Distribution BoardCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that came withthe product.NOTE: This system has two power distribution boards. The procedure to removeand install both the power distribution boards is similar. To access the secondpower distribution board at the bottom, remove the power distribution board atthe top.1 Recommend to turn off the system, including any attached peripherals,and disconnect the system from its electrical outlet.2 Open the system. See "Opening the System" on page 174.3 Remove the power supply. See "Removing a Power Supply" on page 110.4 Disconnect all the cables from the first power distribution board. See
