HP EliteBook 840 G8, Руководство по техническому обслуживанию и ремонту

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3. Thoroughly clean the thermal material from the surfaces of the heat sink and the system board
components each time the heat sink is removed. Replacement thermal material is included with the heat
sink and system board spare part kits. The following illustration shows the replacement thermal
material locations.
Thermal paste is used on the system board component (1) and on the heat sink area (2) that services it.
Reverse this procedure to install the heat sink.
System board
To remove the system board, use these procedures and illustrations.
Table 6-12 System board descriptions and part numbers
Description Spare part
number
System board (includes processor):
All system boards use the following part numbers:
xxxxxx-001: Non-Windows operating system
xxxxxx-601: Windows 10 operating system
System board with integrated Intel Core i7-1165G7 processor M36402-xx1
System board with integrated Intel Core i5-1135G7 processor M36401-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly ( Preparation for disassembly on page 33 ).
2. Remove the bottom cover ( Bottom cover on page 33 ).
3. Remove the battery (see Battery on page 43 ).
4. Remove the fan (see Fan on page 53 ).
When you replace 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:
56 Chapter 6 Removal and replacement procedures for authorized service provider parts