HP ProBook 645 G2

5 Removal and replacement procedures for Customer Self-Repair parts ............................................................. 37
Component replacement procedures .................................................................................................................. 37
Service door ....................................................................................................................................... 37
Battery ............................................................................................................................................... 38
Hard drive .......................................................................................................................................... 39
Solid-state drive (select products only) ............................................................................................ 41
WWAN module (select products only) ............................................................................................... 42
WLAN module .................................................................................................................................... 44
Optical drive ....................................................................................................................................... 46
Keyboard ........................................................................................................................................... 48
Memory .............................................................................................................................................. 51
6 Removal and replacement procedures for Authorized Service Provider parts ................................................... 54
Component replacement procedures .................................................................................................................. 54
Hinge cover ........................................................................................................................................ 55
Base enclosure .................................................................................................................................. 57
System board .................................................................................................................................... 59
Fan and heat sink assembly .............................................................................................................. 61
Optical drive board ............................................................................................................................ 64
Top cover and TouchPad .................................................................................................................... 65
RTC battery ........................................................................................................................................ 68
Speaker .............................................................................................................................................. 70
Power button board .......................................................................................................................... 71
Fingerprint reader (select products only) ......................................................................................... 72
Smart card reader .............................................................................................................................. 74
Near Field Communication module ................................................................................................... 76
Audio board ....................................................................................................................................... 78
Serial .................................................................................................................................................. 80
Display assembly ................................................................................................................................................. 82
7 Computer Setup (BIOS), TPM, and HP Sure Start in Windows 10 ........................................................................ 88
Using Computer Setup ......................................................................................................................................... 88
Starting Computer Setup .................................................................................................................. 88
Navigating and selecting in Computer Setup ................................................................................... 88
Restoring factory settings in Computer Setup ................................................................................. 89
Updating the BIOS ............................................................................................................................. 90
Determining the BIOS version ......................................................................................... 90
Downloading a BIOS update ........................................................................................... 90
Changing the boot order using the f9 prompt .................................................................................. 91
TPM BIOS settings (select products only) ........................................................................................................... 91
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