Maintenance and Service Guide

3.
Remove the system board (3).
Reverse this procedure to install the system board.
Heat sink
Description Spare part number
Heat sink (includes replacement thermal material) 700804-001
Before removing the heat sink, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see
Bottom cover on page 33), and then remove the following
components:
a. Battery (see
Battery on page 35)
b. Fan (see
Fan on page 39)
c. System board (see
System board on page 62)
Component replacement procedures
65