HP ProBook 455 G4

5 Removal and replacement procedures for Customer Self-Repair parts ............................................................. 32
Component replacement procedures .................................................................................................................. 32
Battery Safe mode ............................................................................................................................ 32
Service door ....................................................................................................................................... 33
Optical drive ....................................................................................................................................... 34
Hard drive .......................................................................................................................................... 36
Memory modules ............................................................................................................................... 38
WLAN/Bluetooth combo card ............................................................................................................ 40
WWAN module ................................................................................................................................... 42
M.2 solid-state drive ......................................................................................................................... 44
Keyboard ........................................................................................................................................... 45
6 Removal and replacement procedures for Authorized Service Provider parts ................................................... 48
Component replacement procedures .................................................................................................................. 48
Display subcomponents (bezel, webcam, panel) ............................................................................. 48
Top cover ........................................................................................................................................... 52
Fingerprint reader assembly ............................................................................................................. 56
Power button board .......................................................................................................................... 58
Function board .................................................................................................................................. 60
Speaker assembly ............................................................................................................................. 62
TouchPad assembly ........................................................................................................................... 64
Battery ............................................................................................................................................... 66
USB/audio board ................................................................................................................................ 68
Fan ..................................................................................................................................................... 70
Optical drive connector cable ............................................................................................................ 72
System board .................................................................................................................................... 74
RTC battery ........................................................................................................................................ 77
Heat sink assembly ........................................................................................................................... 79
Display assembly ............................................................................................................................... 82
Power connector and cable ............................................................................................................... 89
7 Computer Setup (BIOS), TPM, and HP Sure Start ............................................................................................. 91
Using Computer Setup ......................................................................................................................................... 91
Starting Computer Setup .................................................................................................................. 91
Navigating and selecting in Computer Setup ................................................................................... 91
Restoring factory settings in Computer Setup ................................................................................. 91
Updating the BIOS ............................................................................................................................. 92
Determining the BIOS version ......................................................................................... 92
Downloading a BIOS update ........................................................................................... 93
Changing the boot order using the f9 prompt .................................................................................. 93
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