System board
NOTE: All system board spare part kits include replacement thermal material.
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating systems
xxxxxx-601: Windows operating system
Description Spare part number
System board with integrated Intel Core i7-8650U processor L21623-xx1
System board with integrated Intel Core i7-8550U processor L21622-xx1
System board with integrated Intel Core i5-8350U processor L21621-xx1
System board with integrated Intel Core i5-8250U processor L21620-xx1
System board with integrated Intel Core i5-7300U processor L21619-xx1
System board with integrated Intel Core i5-7200U processor L21618-xx1
Before removing the system board, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by rst unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4. Remove the bottom cover (see Bottom cover on page 30).
5. Remove the battery (see Battery on page 33).
6. Remove the following components:
a. Keyboard (see Keyboard on page 43)
b. Hard drive (see Hard drive on page 34)
c. Internal base plate (see Internal base plate on page 48)
d. Fingerprint reader assembly (see Fingerprint reader assembly on page 52)
e. Power button board (see Power button board on page 54)
f. USB/VGA board (see USB/VGA board on page 60)
g. Smart card reader board (see Smart card reader board on page 58)
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 modules (see Memory modules on page 37)
●
WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 39)
●
WWAN module (see WWAN module on page 41)
●
Solid-state drive (see M.2 solid-state drive on page 36)
Component replacement procedures 61
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