Lenovo ThinkCentre A51p - Removing and replacing the microprocessor

Removing and replacing the microprocessor
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.
When you receive a new microprocessor, you will also receive a new heat sink and
vacuum pen. You must replace the heat sink as well as the microprocessor. If you
use the old heat sink with the new microprocessor, your computer could overheat
and shut down sporadically.
Important
Avoid handling the microprocessor with your hands, and avoid contact with
the microprocessor contacts. Use the vacuum pen to remove and install the
microprocessor. If you must touch the microprocessor, touch only the sides.
To remove the microprocessor, do the following:
1. Turn off the computer and allow it to cool to for one hour.
2. Open the cover. See “Removing the cover” on page 1.
3. Lay the computer on its side.
4. Remove the air baffle by pressing on the tab and pulling the air baffle up.
5. Disconnect the fan cable from the system board. Note the cable location on the
system board.
Replacing customer replaceable units (CRUs) 9