A SERVICE OF

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When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
Memory module (see
Memory module on page 43)
RTC battery (see
RTC battery on page 74)
Fan and heat sink (see
Fan and heat sink on page 76).
PCH heat sink (see
PCH heat sink on page 79)
Processor (see
Processor on page 81)
Remove the system board:
1. Disconnect the following cables from the system board:
(1) Display panel cable
(2) Optical drive cable
(3) USB board cable
(4) Power connector cable
2. Remove the Phillips M2.5 × 4.5 screw (1) that secures the system board to the base enclosure.
3. Lift the right side of the system board (2) until it rests at an angle.
72 Chapter 4 Removal and replacement procedures ENWW