
Note:
Position the new heat sink and fan assembly so that the heat sink and fan assembly cable is
toward the microprocessor fan connector on the system board.
9. Follow the following sequence to install the four screws to secure the new heat sink and fan assembly.
Do not over-tighten the screws.
a. Partially tighten screw
1
, then fully tighten screw
2
, and then fully tighten screw
1
.
b. Partially tighten screw
3
, then fully tighten screw
4
, and then fully tighten screw
3
.
10. Connect the heat sink and fan assembly cable to the microprocessor fan connector on the system
board. See “Locating parts on the system board” on page 12.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 64.
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
This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and microprocessor 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 microprocessor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 32.
3. Lay the computer on its side for easier access to the system board.
4. Locate the system board and disconnect all cables connected to the system board. See “Locating
parts on the system board” on page 12.
5. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 48.
Note:
Place the heat sink and fan assembly on its side so that the thermal grease on the bottom of it
does not get in contact with anything.
50
ThinkCentre User Guide
Summary of Contents for 7052A7U
Page 2: ......
Page 8: ...vi ThinkCentre User Guide ...
Page 14: ...xii ThinkCentre User Guide ...
Page 34: ...20 ThinkCentre User Guide ...
Page 38: ...24 ThinkCentre User Guide ...
Page 44: ...30 ThinkCentre User Guide ...
Page 80: ...66 ThinkCentre User Guide ...
Page 88: ...74 ThinkCentre User Guide ...
Page 94: ...80 ThinkCentre User Guide ...
Page 102: ...88 ThinkCentre User Guide ...
Page 134: ...120 ThinkCentre User Guide ...
Page 140: ...126 ThinkCentre User Guide ...
Page 141: ......
Page 142: ...Part Number 0A22862 Printed in USA 1P P N 0A22862 0A22862 ...