CHAPTER 5: Upgrading Your Computer
Replacing the power supply
Tools
You need a Phillips screwdriver and a Torx® or “star” driver (size T15) to replace the power supply. A slotted (flat) screwdriver can be used in place of the Torx driver, but it must be the 7/64" (3 mm) size, and you must be very careful while applying torque so that the screw head does not get stripped.
To replace the power supply:
1Remove the side panel by following the instructions in “Removing the side panel” on page 47. Make sure that you disconnect the power cable.
2Disconnect the power supply cables from all components (such as hard drives, optical and diskette drives, and the system board), noting their locations and orientation. (You will reconnect the cables after you install the new power supply.)
3Remove the three Phillips screws that secure the power supply to the power supply bracket.
Phillips screws
Torx screws
4Use a Torx (“star”) T15 driver to remove the two Torx screws that secure the power supply bracket to the computer, then slide the bracket down and off the computer.
5Slide the power supply and cables out the back of the computer.
6Insert the new power supply and cables into the case through the opening in the back of the computer.
7Slide the power supply bracket into place, then secure it into place using the two Torx screws you removed previously.
8Secure the power supply to the power supply bracket using the three Phillips screws you removed previously.
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