Maintenance and Service Guide

Power supply
WARNING! To reduce potential safety issues, only the power supply provided with the computer, a
replacement power supply provided by HP, or a power supply purchased as an accessory from HP should be
used with the computer.
WARNING! Voltage is always present on the system board when the computer is plugged into an active AC
outlet. To avoid possible personal injury and damage to the equipment the power cord should be
disconnected from the computer and/or the AC outlet before opening the computer.
1. Prepare the computer for disassembly (Preparation for disassembly on page 17).
2. Remove the access panel (Access panel on page 18).
3. Remove the drive cage (Drive cage on page 22).
4. From the outside, rear of the chassis, remove the four Torx T15 screws that secure the power supply to
the back of the chassis.
5. From the inside of the chassis, disconnect all power cables from the system board as follows:
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(1): PWR
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(2): PWRCMD
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(3): PWRCPU
44 Chapter 4 Removal and replacement procedures