System board
NOTE: All system board spare part kits include replacement thermal material.
Description Spare part number
Models without Windows 8 with 1-GB of discrete graphics memory 734083-001
Models without Windows 8 with 2-GB of discrete graphics memory 734084-001
Models without Windows 8, with UMA graphics, without WWAN 734085-001
Models without Windows 8, with UMA graphics, with WWAN 734087-001
Windows 8 Standard models with 1-GB of discrete graphics memory 734083-501
Windows 8 Professional models with 1-GB of discrete graphics memory 734083-601
Windows 8 Standard models with 2-GB of discrete graphics memory 734084-501
Windows 8 Professional models with 2-GB of discrete graphics memory 734084-601
Windows 8 Standard models, UMA graphics, without WWAN 734085-501
Windows 8 Professional models, UMA graphics, without WWAN 734085-601
Windows 8 Standard models, UMA graphics, with WWAN 734087-501
Windows 8 Professional models, UMA graphics, with WWAN 734087-601
Before removing the system board, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 37).
5. Remove the following components:
a. Service door (see
Service door on page 38).
b. Hard drive (see
Hard drive on page 39)
c. Optical drive (see
Optical drive on page 42)
d. Keyboard (see
Keyboard on page 50)
e. Top cover (see
Top cover on page 54)
When replacing the system board, be sure to remove the following components from the defective
system board and install on the replacement system board:
●
Memory module (see
Memory modules on page 44)
●
WLAN/Bluetooth module (see
WLAN/Bluetooth combo card on page 46)
68 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts