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Heat sink and fan assembly
Prerequisite
Before you start, read Generic Safety and Compliance Notices, and print the following instructions.
The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the
computer and wait several minutes until the computer is cool.
For access, do the following:
1. Remove these parts in order, if any:
• "Computer cover" on page 49
• "Optical drive" on page 50
• "Front bezel" on page 51
• "Optical drive cage" on page 55
2. Disconnect the microprocessor fan cable from the system board.
Replacement procedure of 65-watt heat sink and fan assembly
1. Follow the following sequence to loosen the four screws that secure the heat sink and fan assembly to
the system board. Then, lift the heat sink and fan assembly off the system board.
• Partially loosen screw
• Partially loosen screw
Notes:
• Carefully loosen the four screws to avoid any possible damage to the system board. The four screws
cannot be removed from the heat sink and fan assembly.
• You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
• Do not touch the thermal grease while handling the heat sink and fan assembly.
72
M90t Gen 3 Hardware Maintenance Manual
1a
, fully loosen screw
1b
1c
, fully loosen screw
1d
, and then fully loosen screw
, and then fully loosen screw
1a
.
1c
.
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