Lenovo ThinkStation P520, User Manual, Page: 131 / 174

• You might have to gently twist the heat-sink-and-fan assembly to free it from the microprocessor.
• Do not touch the thermal grease while handling the heat-sink-and-fan assembly.
7. Apply appropriate amount of thermal grease to the new heat-sink-and-fan assembly.
8. Position the new heat-sink-and-fan assembly on the system board so that the four screws are aligned
with the holes in the system board.
Note: Ensure that the heat-sink-and-fan assembly cable is toward the microprocessor fan connector on
the system board.
9. Install the four screws to secure the new heat-sink-and-fan assembly in diagonal sequence. 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 “Parts on the system board” on page 8.
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 134.
Super capacitor module
Attention: Do not open your computer or attempt any repair before reading and understanding the “Read
this first: Important safety information” on page iii.
To remove or install the super capacitor module, do the following:
1. Prepare your computer. See “Preparing your computer and removing the computer cover” on page 59.
2. Lay the computer on its side for easier access to the super capacitor module.
3. To remove the super capacitor module, do the following:
a. Pull and pivot the tab on the front fan assembly as shown to open the latch inside.
Figure 112. Opening the latch in the front fan assembly
Chapter 7
.
Hardware removal and installation
119