116 | Installing System ComponentsInstalling a System-Board AssemblyCAUTION: 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.1 Slide the system-board assembly into the chassis until it snaps intoplace. See Figure 3-6.2 Rotate the retaining latches on both sides of the system-boardassembly upwards to the top to secure the system-board assembly withthe chassis. See Figure 3-6.3 Reconnect all the external cables to the system board.4 Reconnect the system to its electrical outlet and turn on the system,including any attached peripherals.Air DuctsRemoving the Air DuctCAUTION: 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.1 Recommend to turn off the system, including any attached peripherals,and disconnect the system from its electrical outlet.2 Remove the system-board assembly. See “Removing a System-BoardAssembly" on page 115.3 Squeeze and remove the rivets that secure the air ducts to the system-
