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4. Position the heat sink atop the processor.
5. 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.
6. 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 BIOS can
be found on the Web at:
http://h18000.www1.hp.com/support/files.
172 Chapter 7 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis