Installing System Components 135SAS BackplaneRemoving the SAS BackplaneCAUTION: 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 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.2 Open the system. See "Opening the System" on page 78.CAUTION: To prevent damage to the drives and backplane, you must remove thehard drives from the system before removing the backplane.CAUTION: You must note the number of each hard drive and temporarily labelthem before removal so that you can replace them in the same locations.3 Remove all hard drives. See "Removing a Hard-Drive Carrier" on page 84.4 Disconnect the power cable from the SAS backplane.5 Disconnect the SAS data cables from the backplane. See Figure 3-25.6 Remove the optical drive cable, control panel cable, power cable, datacables, and USB cables.7 Press the two blue retention latches at either ends of the SAS backplaneand lift it upwards and out of the retention hooks. Be careful to avoiddamaging the other components on the face of the board. See Figure 3-25.8 Place the SAS backplane face down on a work surface.
