Installing System Components 151Replacing the 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 not coveredby your warranty. Read and follow the safety instructions that came with theproduct.1 Unpack the new power distribution board assembly.2 Align the securing slots on the board with the tabs on the chassis.3 Pull the release tab slightly to the back of the system and slide the boarddown till it snaps into place. See Figure 3-29.4 Connect the system board and the I/O board to engage the interconnectbetween the power distribution board and the I/O board:a Align the guide pins on one half of the connector with the slots on theother half of the connector. See Figure 3-29.b Push the release levers inward until they lock into position. SeeFigure 3-29.5 Connect the cable to the power distribution board.6 Install the cooling fan assembly. See "Installing the Cooling Fan Assembly"on page 111.7 Install the power supplies in the system. See "Installing a Power Supply" onpage 95.8 Close the system. See "Closing the System" on page 85.9 Reconnect the system to its electrical outlet and turn the system on,including any attached peripherals.
