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System Board
Description Spare part number
System board for use in models without Windows 8 (includes thermal material) 657094-001
System board for use in models with Windows 8 Standard (includes replacement thermal
material)
657094-501
System board for use in models with Windows 8 Professional (includes replacement thermal
material)
657094-601
1. Prepare the computer for disassembly (Preparation for Disassembly on page 75).
2. Remove the access panel (
Computer Access Panel on page 123).
3. Remove the front fan assembly (
Front Fan Assembly on page 147).
4. When replacing the system board, make sure the following components are removed from the
defective system board and installed on the replacement system board:
●
Memory modules (
Memory on page 128)
●
Expansion cards (
Expansion Cards on page 130)
●
Heat sink (
Heat sink on page 151).
●
Processor (
Processor on page 153)
5. Remove all expansion boards (
Expansion Cards on page 130).
6. Disconnect all cables connected to the system board, noting their location for reinstallation.
7. Remove the eight Torx T15 screws that secure the system board to the chassis.
Figure 7-36 System board screws
System Board 161