Removing And Replacing The Microprocessor - Lenovo ThinkCentre A51p Hardware Removal And Replacement Manual

10. Install the screws that secure the system board to the chassis.
11. Reconnect all cables that were disconnected from the system board. See
12. Replace any PCI adapters that were removed. See "Removing and replacing a
13. To complete the installation, go to "Completing the CRU replacement" on

Removing and replacing the microprocessor

When you receive a new microprocessor, you will also receive a new heat sink and
vacuum pen. You must also replace the heat sink when replacing the
microprocessor. If you use the old heat sink with the new microprocessor, your
computer might over heat and periodically shut down.
This section provides instructions on how to remove and replace the
microprocessor.
Important
If the metal plate is not aligned correctly when you install the screws,
you might damage the system board.
Figure 1 on page 5.
PCI adapter" on page 15.
page 16.
Attention
Do not open your computer or attempt any repair before reading the
"Important safety information" in the Quick Reference that was included with
your computer. If you no longer have this copy of the Quick Reference, you
can obtain one online from the IBM Web site at
http://www.ibm.com/pc/support.
Important
Shut down and turn off your computer for at least one hour before removing
the microprocessor to allow the thermal interface between the microprocessor
and the heat sink time to cool down.
1. Remove the cover. See "Removing the cover" on page 1.
Replacing customer replaceable units (CRUs)
7