HP ELITEBOOK 840 G4, Maintenance And Service Manual, Page: 72 / 116

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 Intel i7-7600U processor 917507-xx1
System board with Intel i7-7500U processor 917504-xx1
System board with Intel i5-7300U processor 917501-xx1
System board with Intel i5-7200U processor 917503-xx1
System board with Intel i3-7100U processor 917499-xx1
Before removing the system board, follow these steps:
1. Shut down 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 all external devices connected to the computer.
3. Disconnect the power from the computer by first 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 32 ).
5. Remove the battery (see Battery on page 36 ).
6. Remove the keyboard (see Keyboard on page 47 ).
7. Remove the internal base plate (see Internal base plate on page 50
When replacing the system board, be sure to remove the following components (as needed) from the
defective system board and install on the replacement system board:
● Solid-state drive (see Solid-state drive (SSD) on page 39 )
● Memory modules (see Memory modules on page 40 )
● WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 42 )
● WWAN module (see WWAN module on page 44 )
● Heat sink/fan assembly (see Heat sink/fan assembly on page 53 )
Remove the system board:
1. Position the computer upright and open as far as possible.
62 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts