2. Secure the locking lever.
Figure 9-28 Replacing the processor
If reusing the existing heat sink, go to step 3.
If using a new heat sink, go to step 5.
3. If reusing the existing heat sink, clean bottom of the heat sink and apply the thermal grease
provided in the spares kit to the top of the processor.
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.
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.
Processor 235
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