Lenovo ThinkServer TD350 70DG User Manual And Hardware Maintenance Manual page 169

5. Remove the four screws that secure the heat sink to the system board. It is recommended that you
carefully remove the four screws using the following method to avoid any possible damage to the
system board.
a. Partially remove screw
completely remove it.
b. Partially remove screw
completely remove it.
Note: The four screws are integrated parts of the heat sink. Do not try to remove the four screws
from the heat sink.
Figure 120. Removing the screws that secure the heat sink
6. Gently twist the heat sink to free it from the microprocessor and then lift the heat sink off the system
board.
7. Lay aside the old heat sink. Touch the static-protective package that contains the new heat sink to any
unpainted surface on the outside of the server. Then, remove the new heat sink from the package and
remove the protective cover from the heat sink.
Notes:
• When handling the heat sink, do not touch the thermal grease on the bottom of it.
• Before installing the new heat sink, use the cleaning pad that comes with the new heat sink to wipe
the thermal grease from the top of the microprocessor. Dispose of the cleaning pad after all of the
thermal grease is removed from the microprocessor.
8. Place the new heat sink on the system board so that the four screws on the new heat sink are aligned
with the corresponding mounting studs on the system board. Note the orientation of the new heat sink.
Ensure that the arrow on the new heat sink points to the rear of the server. See "Server components"
on page 25.
1
, then completely remove screw
2 , then completely remove screw
3
, and then return to screw
4 , and then return to screw
.
Chapter 6 Replacing hardware
1
and
2 and
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