IBM THINKCENTRE 8123 - Manual (Page 27)

Replacing the microprocessor
Attention:
Do not remove the computer cover or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer or in the
Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick
Reference or HMM, go to http://www.ibm.com/pc/support.
Important
Leave your computer turned off 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.
Important
When you receive a new microprocessor, you will also receive a new heat
sink and vacuum pen. You must use the new heat sink with the new
microprocessor. If you use the old heat sink with the new microprocessor,
your computer might overheat causing intermittent problems.
Important
Avoid handling the microprocessor with your hands, and avoid contact with
the microprocessor contacts. Use the vacuum pen provided to remove and
install the microprocessor. If you must touch the microprocessor, touch only
the sides.
1. Remove the computer cover. See “Removing the computer cover” on page 5.
Note: For this procedure, it helps to lay the computer on its side.
Chapter 2. Replacing hardware 19