Maintenance and Service Guide

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
Table 6-14 Spare part description and number
Description Spare part number
System board for use in models with discrete graphics memory:
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Intel Core i5-8265U processor with 2 GB of discrete graphics memory L49981-xx1
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Intel Core i3-7020U processor with 2 GB of discrete graphics memory L49980-xx1
System board for use in models with UMA graphics memory:
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Intel Core i7-8565U processor L49976-xx1
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Intel Core i5-8265U processor L49975-xx1
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Intel Core i3-7020U processor L49974-xx1
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Intel Pentium N5000 processor L49979-xx1
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Intel Pentium 4417U processor L53961-xx1
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Intel Celeron N4000 processor L49978-xx1
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Intel Celeron N3060 processor L49977-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 28).
2. Remove the following components:
a. Optical drive (see Optical drive on page 29)
b. Bottom cover (see Bottom cover on page 32)
c. Battery (see Battery on page 34)
d. Display (see Display assembly on page 54)
When replacing the system board, be sure to remove the following components (as applicable) from
the defective system board and install them on the replacement system board:
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WLAN module (see WLAN module on page 43)
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Memory modules (see Memory on page 36)
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Heat sink (see Heat sink assembly on page 50)
Remove the system board:
IMPORTANT: Make special note of each screw size and location during removal and replacement
Component replacement procedures 63