System board
NOTE: The system board spare part kit includes the heatsink, attached to the system board.
Description Spare part number
Equipped with an Intel Core i7-8705G (Up to 3.1 GHz, turbo up to 4.1 GHz, 2400 MHz, 8MB L2 cache, quad
core, 150W) processor, a graphic subsystem with a Radeon RX VEGA M 4GB GPU, and the Windows 10 Pro
operating system
L15574-601
Equipped with an Intel Core i7-8705G (Up to 3.1 GHz, turbo up to 4.1 GHz, 2400 MHz, 8MB L2 cache, quad
core, 150W) processor, a graphic subsystem with a Radeon RX VEGA M 4GB GPU, and a non-Windows 10 Pro
operating system
L15574-001
Equipped with an Intel Core i7-8550U (Up to 1.8GHz, turbo up to 4.0 GHz, 2400 MHz, 8MB L2 cache, quad
core 90W) processor, a graphic subsystem with a NVIDIA N175–G1 (GeForce MX150) 2GB GPU, and the
Windows 10 operating system
L155573-601
Equipped with an Intel Core i7-8550U (Up to 1.8GHz, turbo up to 4.0 GHz, 2400 MHz, 8MB L2 cache, quad
core 90W) processor, a graphic subsystem with a NVIDIA N175–G1 (GeForce MX150) 2GB GPU, and a non-
Windows 10 operating system
L155573-001
IMPORTANT: Make special note of each screw and screw lock size and location during removal
and replacement
Before removing the system board, follow these steps:
1. Shut down the computer.
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 29), and then remove the following components:
a. Battery (see Battery on page 31).
b. System board mylar (see Left fan on page 45).
c. Left fan (see Left fan on page 45).
d. Right fan(see Right fan on page 47).
Remove the system board:
1. Disconnect the left rear speaker cable from the system board (1).
2. Disconnect the webcam cable from the system board (2).
3. Disconnect the WLAN module cables from the WLAN module (3).
4. Disconnect the left front speaker cable from the system board (4).
5. Disconnect the ngerprint reader board cable from the system board (5).
6. Disconnect the volume button board cable from the system board (6).
7. Disconnect the keyboard backlight cable from the system board (7).
52 Chapter 5 Removal and replacement procedures for authorized service provider parts
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