System board
Component Spare part number
System board equipped with an Intel Core i7-4720HQ processor and 2 GB of discrete graphics memory (includes thermal grease and
thermal pads)
Includes 16 GB of system memory 812014-001
Includes 8 GB of system memory 812013-001
System board equipped with an Intel Core i7-4870HQ processor and 2 GB of discrete graphics memory (includes thermal grease and
thermal pads)
Includes 16 GB of system memory 812012-001
Includes 8 GB of system memory 808333-001
Before replacing the system board, 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 20).
5. Remove the battery (see
Battery on page 28).
6. Remove the WLAN module (see
WLAN module on page 23).
7. Remove the SSD module (see
Solid-state drive (M.2) on page 25).
8. Remove the heat sink and fans (see
Heat sink and fans on page 26).
Remove the system board:
1. Disconnect the following cables from the system board.
(1): Display cable
(2): Left speaker cable
(3): Power connector cable
(4): Left light assembly cable
(5): TouchPad cable
(6): Keyboard cable
(7): Touch control cable
(8): Webcam cable
(9): Right speaker cable
(10): Right light assembly cable
(11): Power button board cable
(12): Light module cable
System board 31
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