5. Go to step 7.
6. If using a new heat sink, remove the protective covering from the bottom of the heat sink and
place it in position atop the processor.
7. Secure the heat sink to the system board and system board tray with the 4 captive screws and
attach the heat sink control cable to the system board.
CAUTION: Heat sink retaining screws should be tightened in diagonally opposite pairs (as in
an X) to evenly seat the heat sink on the processor. This is especially important as the pins on
the socket are very fragile and any damage to them may require replacing the system board.
NOTE: After installing a new processor onto the system board, always update the system
ROM to ensure that the latest version of the BIOS is being used on the computer. The latest
system ROM BIOS can be found on the Web at:
http:\\h18000.www1.hp.com/support/files.
Power Supply
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.
NOTE: When installing a new power supply, be sure to set the red switch to the setting (230 V or
115 V) appropriate for the country in which the computer is used. Spare power supplies normally
arrive set for 230 V.
1. Prepare the computer for disassembly (Preparation for Disassembly on page 35).
2. Remove the access panel (
Access Panel on page 36).
3. Lay the computer on its side with the rear facing toward you.
4. Disconnect all power cables from the mass storage devices and from the system board.
5. Remove the four screws that secure the power supply to the chassis.
NOTE: HP Pro 3010 shown.
72 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis
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