HP EliteBook 820 G2 Maintenance And Service Manual page 6

3 Illustrated parts catalog .............................................................................................................................. 21
Computer major components ............................................................................................................................. 21
Display assembly components ........................................................................................................................... 27
Plastics Kit ........................................................................................................................................................... 29
Mass storage devices .......................................................................................................................................... 30
Miscellaneous parts ............................................................................................................................................. 31
Sequential part number listing ........................................................................................................................... 33
4 Removal and replacement preliminary requirements ..................................................................................... 41
Tools required ...................................................................................................................................................... 41
Service considerations ........................................................................................................................................ 41
Grounding guidelines ........................................................................................................................................... 42
5 Removal and replacement procedures for Customer Self-Repair parts ............................................................. 46
Component replacement procedures ................................................................................................................. 46
6 Removal and replacement procedures for Authorized Service Provider parts ................................................... 65
Component replacement procedures ................................................................................................................. 65
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Plastic parts ....................................................................................................................................... 41
Cables and connectors ...................................................................................................................... 42
Drive handling ................................................................................................................................... 42
Electrostatic discharge damage ....................................................................................................... 42
Packaging and transporting guidelines ......................................................................... 44
Workstation guidelines ................................................................................ 44
Service cover ..................................................................................................................................... 46
Battery ............................................................................................................................................... 48
Hard drive .......................................................................................................................................... 50
WWAN module ................................................................................................................................... 53
Solid-state drive ................................................................................................................................ 55
WLAN module .................................................................................................................................... 57
Memory module ................................................................................................................................ 59
Keyboard ........................................................................................................................................... 60
Unlocking the device and disabling Always On Remote Management (select HP devices only) ..... 65
RTC battery ........................................................................................................................................ 66
Top cover ........................................................................................................................................... 67
Display assembly .............................................................................................................................. 71
TouchPad ........................................................................................................................................... 78
NFC module ....................................................................................................................................... 79
Card reader board ............................................................................................................................. 80
Heat sink ............................................................................................................................................ 82