System board
NOTE: The system board spare part kit includes the battery connector bracket and replacement thermal
material.
All system boards use the following part numbers:
xxxxxx-001: Windows 7 or non-Windows operating systems
xxxxxx-501: Windows 8.1 Standard operating system
xxxxxx-601: Windows 8.1 or Windows 10 operating system
Description Spare part number
System board for use only on computer models equipped with:
Intel Core i7-5600U processor 781858-xxx
Intel Core i7-5500U processor 781857-xxx
Intel Core i5-5300U processor 781856-xxx
Intel Core i5-5200U processor 781855-xxx
Intel Core i3-5010U processor 781854-xxx
Before removing the system board, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o 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 service cover (see Service cover on page 37), and then remove the following components:
a. Battery (see Battery on page 39)
b. Hard drive (see Hard drive/solid-state drive on page 41)
c. Keyboard (see Keyboard on page 50)
d. RTC battery (see RTC battery on page 56)
e. Top cover (see Top cover on page 57)
f. Heat sink (see Heat sink on page 72)
g. Fan (see Fan on page 74)
NOTE: 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:
●
WWAN module (see WWAN module on page 44)
●
Solid-state drive (see M.2 solid-state drive on page 46)
●
WLAN module (see WLAN module on page 47)
●
Memory modules (see Memory module on page 49)
Remove the system board:
76 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
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