Lenovo ThinkCentre M92z Hardware Maintenance Manual - ThinkCentre M92z (type 3 - Page 97

Replacing the heat sink, Remove the computer cover. See Removing the computer cover

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Figure 22. Removing the converter board 7. Connect the cables to the new converter board and align the three screw holes in the new converter board with those in the chassis. 8. Install the three screws to secure the new converter board to the chassis. 9. Reinstall the optical drive. See "Replacing the optical drive" on page 90. 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 127. Replacing the heat sink Attention: Do not open your computer or attempt any repair before reading and understanding "Important Safety Information" on page 1. This section provides instructions on how to replace the heat sink. CAUTION: The heat sink 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, 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. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay it down so that the screen is against the surface and the cover is facing up. 3. Remove the computer cover. See "Removing the computer cover" on page 83. 4. Locate the heat sink. See "Locating major FRUs and CRUs (for models with the 20-inch display)" on page 73 or "Locating major FRUs and CRUs (for models with the 23-inch display)" on page 76. 5. Follow this sequence to remove the four screws that secure the heat sink to the system board: a. Partially remove screw 1 , then fully remove screw 2 , and then fully remove screw 1 . Chapter 9. Replacing FRUs 93

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Figure 22. Removing the converter board
7. Connect the cables to the new converter board and align the three screw holes in the new converter
board with those in the chassis.
8. Install the three screws to secure the new converter board to the chassis.
9. Reinstall the optical drive. See “Replacing the optical drive” on page 90.
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 127.
Replacing the heat sink
Attention:
Do not open your computer or attempt any repair before reading and understanding “Important Safety Information”
on page 1.
This section provides instructions on how to replace the heat sink.
CAUTION:
The heat sink 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, 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. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 83.
4. Locate the heat sink. See “Locating major FRUs and CRUs (for models with the 20-inch display)” on
page 73 or “Locating major FRUs and CRUs (for models with the 23-inch display)” on page 76.
5. Follow this sequence to remove the four screws that secure the heat sink to the system board:
a.
Partially remove screw
1
, then fully remove screw
2
, and then fully remove screw
1
.
Chapter 9
.
Replacing FRUs
93