Dell Latitude 9420 Service Manual page 4

Installing the right speaker........................................................................................................................................ 39
Wireless Local Area Network (WLAN) Antenna module......................................................................................... 40
Removing the WLAN antenna module................................................................................................................... 40
Installing the WLAN antenna module...................................................................................................................... 41
I/O daughter board........................................................................................................................................................... 43
Removing the I/O daughter board.......................................................................................................................... 43
Installing the I/O daughter board............................................................................................................................ 44
Power button with fingerprint reader assembly........................................................................................................ 45
Removing the power button with fingerprint reader assembly ...................................................................... 45
Installing the power button with fingerprint reader assembly .........................................................................46
System board..................................................................................................................................................................... 46
Removing the system board..................................................................................................................................... 46
Installing the system board....................................................................................................................................... 49
USH daughter board......................................................................................................................................................... 51
Removing the USH daughter board.........................................................................................................................51
Installing the USH daughter board.......................................................................................................................... 52
Wireless Wide Area Network (WWAN) Antenna module........................................................................................ 53
Removing the WWAN main antenna module........................................................................................................53
Installing the WWAN main antenna module.......................................................................................................... 54
Palm-rest assembly.......................................................................................................................................................... 55
Removing the palm-rest assembly.......................................................................................................................... 55
Installing the palm-rest assembly............................................................................................................................ 56
Chapter 3: Software....................................................................................................................58
Downloading the drivers..................................................................................................................................................58
Chapter 4: System setup............................................................................................................. 59
BIOS overview................................................................................................................................................................... 59
Entering BIOS setup program........................................................................................................................................ 59
Boot menu...........................................................................................................................................................................59
Navigation keys................................................................................................................................................................. 60
Boot Sequence.................................................................................................................................................................. 60
System setup options.......................................................................................................................................................60
Overview........................................................................................................................................................................ 61
Boot Configuration......................................................................................................................................................62
Integrated Devices...................................................................................................................................................... 63
Storage.......................................................................................................................................................................... 64
Display............................................................................................................................................................................ 65
Connection....................................................................................................................................................................66
Power............................................................................................................................................................................. 66
Security..........................................................................................................................................................................68
Passwords..................................................................................................................................................................... 69
Update Recovery..........................................................................................................................................................71
System Management...................................................................................................................................................71
Keyboard........................................................................................................................................................................72
Pre-boot Behavior....................................................................................................................................................... 73
Virtualization................................................................................................................................................................. 74
Performance................................................................................................................................................................. 75
System Logs................................................................................................................................................................. 76
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