Lenovo 6139 Personal Computer User Manual


 
3. Remove the four screws that secure the heat sink 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.
4. Lift the failing heat sink off the system board.
Notes:
a. You might have to gently twist the heat sink to free it from the
microprocessor.
b. Do not touch the thermal grease while handling the heat sink.
5.
Position the new heat sink on the system board so that the four screws are
aligned with the holes on the system board.
6. Alternate tightening each screw a small and equal amount until the heat sink
and fan assembly is secured to the system board. Do not over-tighten the
screws.
7. Go to “Completing the parts replacement” on page 30.
Figure 16. Removing the heat sink
20 User Guide