Replacing The Microprocessor - Lenovo ThinkStation 4215 Hardware Maintenance Manual

10. Connect the heat sink and fan assembly cable to the microprocessor fan

Replacing the microprocessor

This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and microprocessor 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 microprocessor, do the following:
8. Position the new heat sink and fan assembly on the system board so that the
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.
9. Follow this sequence to install the four screws to secure the heat sink and fan
assembly, as shown in Figure 21 on page 100.
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 .
connector on the system board. See "Locating parts on the system board" on
page 86.
What to do next:
v To work with another piece of hardware, go to the appropriate section.
v To complete the replacement, go to "Completing the FRU replacement" on
page 122.
Attention
Do not open your computer or attempt any repair before reading and
understanding the "Important safety information" in the ThinkStation Safety
and Warranty Guide that came with your computer. To obtain a copy of the
ThinkStation Safety and Warranty Guide, go to:
http://www.lenovo.com/support
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. Remove the computer cover. See "Removing the computer cover" on page 87.
3. Lay the computer on its side to get easier access to the system board.
4. Remove the heat sink and fan assembly from the system board. See
"Replacing the heat sink and fan assembly" on page 99.
Chapter 9. Replacing FRUs
101