HP EliteBook 850 G5 Notebook PC, Maintenance And Service Manual

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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 for use in models with discrete graphics memory (includes integrated processor)
Intel i7-8650U processor L15521-xx1
Intel i7-8550U processor L15519-xx1
Intel i5-8350U processor L15517-xx1
Intel i5-8250U processor L15515-xx1
Intel i5-7200U processor L15513-xx1
System board for use in models with UMA graphics memory
Intel i7-8650U processor L15522-001
Intel i7-8550U processor L15520-001
Intel i5-8350U processor L15518-001
Intel i5-8250U processor L15516-001
Intel i5-7300U processor L15523-001
Intel i5-7200U processor L15514-001
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 37 ).
5. Remove the battery (see Battery on page 50 ).
6. Remove the keyboard (see Keyboard on page 46 ).
7. Remove the RJ-45 board and bracket (see RJ-45 board with bracket on page 57 ).
8. Remove the fan (see Fan on page 66 ).
When replacing the system board, be sure to remove the following components (as applicable) 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 )
68 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts