256 Adding and Replacing PartsPower SupplyCAUTION: Before performing any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before opening the cover.NOTICE: To prevent static damage to components inside your computer, dischargestatic electricity from your body before you touch any of your computer’s electroniccomponents. You can do so by touching an unpainted metal surface on thecomputer.Removing the Power Supply1 Follow the procedures in "Before You Begin" on page 143.2 Remove the computer cover (see "Removing the Computer Cover" onpage 145).3 Disconnect the DC power cables from the system board and the drives.Note the routing of the DC power cables underneath the tabs in thecomputer frame as you release the tabs and remove the cables from thesystem board and drives. You must route these cables properly when youreplace them to prevent their being pinched or crimped.4 Remove the four screws that attach the power supply to the back of thecomputer chassis.
