Lenovo ThinkStation E20 4215 User Manual page 34

5. Carefully remove the four screws 1 that secure the heat sink and fan
Figure 19. Removing the heat sink and fan assembly
6. Lift the failing heat sink and fan assembly off the system board.
7. Position the new heat sink and fan assembly on the system board so that the
8. Alternate tightening each screw a small and equal amount until the heat sink
9. Connect the heat sink and fan assembly cable to the microprocessor fan
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User Guide
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.
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.
four screws are aligned with the corresponding holes in the system board and
the heat sink and fan assembly cable can be easily connected to the
microprocessor fan connector on the system board.
and fan assembly is secured to the system board. Do not over-tighten the
screws.
connector on the system board. See "Locating parts on the system board" on
page 11.