CAUTION:
The heat sink and fan assembly might be very hot. Turn off the computer and wait three
to five minutes to let the computer cool before removing the computer cover.
To replace the heat sink and fan assembly:
1. Remove the computer cover. See “Removing the computer cover” on page 69.
2. Lay the computer on its side.
3. Locate the heat sink and fan assembly. See “Locating parts on the system board” on page 72.
4. Disconnect the heat sink and the fan assembly cable from the microprocessor fan connector on the
system board. See “Locating parts on the system board” on page 72.
5. Remove the four screws
1
that secure the heat sink and fan assembly to the system board.
Figure 10. Removing the heat sink and fan assembly
6. Lift the failing heat sink and fan assembly off the system board.
Note:
You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
7. Position the new heat sink and fan assembly on the plastic retention bracket so that the four screws
are aligned with the posts on the system board. Tighten the four screws to secure the new heat sink
and fan assembly to the system board.
8. Connect the heat sink and fan assembly cable to the microprocessor fan connector on the system board.
9. Go to “Completing the FRU replacement” on page 99.
Replacing the microprocessor
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the
ThinkCentre Safety and Warranty Guide
that came with your computer. To obtain a copy of the
ThinkCentre
Safety and Warranty Guide
, go to:
http://www.lenovo.com/support
Chapter 8
.
Replacing FRUs (Machine Types: 3063, 3231, 3285, 4084, 4085, 4086, 4087, 6138, 6209, 6239, 6302, 7188, 7244,
7347, 7355, 7358, 7373, 7484, 7571, 7628, 7635, 7639, 8494, 8854, 9728, 9960, and 9965.)
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