HP Pro SFF 280 G9 Desktop PC Maintenance and Service Guide - Page 41

Processor

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1. Prepare the computer for disassembly (see Preparation for disassembly on page 18). 2. Remove the access panel (see Access panel on page 19). 3. Remove the fan duct (see Fan duct on page 33). Remove the heat sink with fan: 1. Disconnect the fan cable from the system board (1). 2. Loosen the four captive Torx screws (2) that secure the heat sink to the system board tray. IMPORTANT: Remove heat sink retaining screws in diagonally opposite pairs (as in an X) to evenly apply the downward forces on the processor. The pins on the socket are fragile, and any damage to them could require replacing the system board. 3. Lift the heat sink from the processor (3). NOTE: Computer appearance might vary. 4. Thoroughly clean the thermal material from the surfaces of the heat sink and the system board components each time the heat sink is removed. Replacement thermal material is included with the heat sink and system board spare part kits. IMPORTANT: Tighten heat sink retaining screws in diagonally opposite pairs (as in an X) to evenly seat the heat sink on the processor to avoid damage that could require replacing the system board. Be sure to replace the fan duct. Failure to install the fan duct can cause the computer to overheat. To replace the heat sink with fan, reverse the removal procedures. Processor To remove the processor, use these procedures. For a list of available processors, see Computer major components on page 4. Before removing the processor, follow these steps: 34 Chapter 4 Removal and replacement procedures

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1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
18
).
2.
Remove the access panel (see
Access panel
on page
19
).
3.
Remove the fan duct (see
Fan duct
on page
33
).
Remove the heat sink with fan:
1.
Disconnect the fan cable from the system board
(1)
.
2.
Loosen the four captive Torx screws
(2)
that secure the heat sink to the system board tray.
IMPORTANT:
Remove heat sink retaining screws in diagonally opposite pairs (as in an X) to evenly apply
the downward forces on the processor. The pins on the socket are fragile, and any damage to them could
require replacing the system board.
3.
Lift the heat sink from the processor
(3)
.
NOTE:
Computer appearance might vary.
4.
Thoroughly clean the thermal material from the surfaces of the heat sink and the system board
components each time the heat sink is removed. Replacement thermal material is included with the heat
sink and system board spare part kits.
IMPORTANT:
Tighten heat sink retaining screws in diagonally opposite pairs (as in an X) to evenly seat the
heat sink on the processor to avoid damage that could require replacing the system board.
Be sure to replace the fan duct. Failure to install the fan duct can cause the computer to overheat.
To replace the heat sink with fan, reverse the removal procedures.
Processor
To remove the processor, use these procedures.
For a list of available processors, see
Computer major components
on page
4
.
Before removing the processor, follow these steps:
34
Chapter 4
Removal and replacement procedures