System board
NOTE:
The system board spare part kit includes replacement thermal material.
You do NOT have to remove the heat sink to remove the system board. You do have to remove the fan
to remove the system board.
Description
Spare part number
System board with Intel Core i7-4500U processor and 8-GB system memory for use in models with
non-Windows 8 operating systems
743849-001
System board with Intel Core i7-4500U processor and 8-GB system memory for use in models with
Windows 8 Standard operating systems
743849-501
System board with Intel Core i7-4500U processor and 8-GB system memory for use in models with
Windows 8 Professional operating systems
743849-601
System board with Intel Core i5-4200U processor and 4-GB system memory for use in models with
non-Windows 8 operating systems
743850-001
System board with Intel Core i5-4200U processor and 4-GB system memory for use in models with
Windows 8 Standard operating systems
743850-501
System board with Intel Core i5-4200U processor and 4-GB system memory for use in models with
Windows 8 Professional operating systems
743850-601
System board with Intel Core i5-4200U processor and 8-GB system memory for use in models with
non-Windows 8 operating systems
743851-001
System board with Intel Core i5-4200U processor and 8-GB system memory for use in models with
Windows 8 Standard operating systems
743851-501
System board with Intel Core i5-4200U processor and 8-GB system memory for use in models with
Windows 8 Professional operating systems
743851-61
Before removing 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 following components:
a.
Bottom cover (see
Bottom cover on page 29
)
b.
Battery (see
Battery on page 46
)
c.
WLAN module (see
WLAN module on page 32
)
d.
Fan (see
Fan on page 41
)
NOTE:
If replacing the system board, be sure to remove the heat sink from the old board and install it
on the new board.
48
Chapter 4 Removal and replacement procedures
