of the
ThinkCentre Safety and Warranty Guide
, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the heat sink and fan assembly.
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, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 64.
3. Lay the computer on its side for easier access to the system board.
4. Locate the heat sink and fan assembly. See “Locating parts on the system board” on page 66.
5. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board. See “Locating parts on the system board” on page 66.
6. Carefully remove the four screws
1
that secure the heat sink and fan assembly to the system board.
Note:
Carefully remove the four screws from the system board to avoid any possible damage to the
system board. The four screws cannot be removed from the heat sink and fan assembly.
Figure 11. Removing the heat sink and fan assembly
7. Lift the failing heat sink and fan assembly off the system board.
Notes:
a. You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
b. Do not touch the thermal grease while handling the heat sink and fan assembly.
72
ThinkCentre Hardware Maintenance Manual
Summary of Contents for 3699
Page 2: ......
Page 15: ...Chapter 2 Safety information 9 ...
Page 19: ...Chapter 2 Safety information 13 ...
Page 20: ...1 2 14 ThinkCentre Hardware Maintenance Manual ...
Page 21: ...Chapter 2 Safety information 15 ...
Page 27: ...Chapter 2 Safety information 21 ...
Page 31: ...Chapter 2 Safety information 25 ...
Page 46: ...40 ThinkCentre Hardware Maintenance Manual ...
Page 68: ...62 ThinkCentre Hardware Maintenance Manual ...
Page 102: ...96 ThinkCentre Hardware Maintenance Manual ...
Page 572: ...566 ThinkCentre Hardware Maintenance Manual ...
Page 576: ...570 ThinkCentre Hardware Maintenance Manual ...
Page 577: ......
Page 578: ...Part Number Printed in USA 1P P N ...