Dell Latitude 3420 Service Manual page 5

Installing the power button with fingerprint reader............................................................................................ 76
System board......................................................................................................................................................................77
Removing the system board..................................................................................................................................... 77
Installing the system board....................................................................................................................................... 79
Speakers.............................................................................................................................................................................. 83
Removing the speaker................................................................................................................................................83
Installing the speaker.................................................................................................................................................. 84
Touchpad ........................................................................................................................................................................... 85
Removing the touchpad.............................................................................................................................................85
Installing the touchpad...............................................................................................................................................86
WWAN I/O board ............................................................................................................................................................. 87
Removing the WWAN I/O board............................................................................................................................. 87
Installing the WWAN I/O board............................................................................................................................... 87
Palmrest assembly............................................................................................................................................................ 88
Removing the palmrest assembly............................................................................................................................88
Installing the palmrest assembly.............................................................................................................................. 89
Camera................................................................................................................................................................................. 91
Removing the camera ................................................................................................................................................ 91
Installing the camera .................................................................................................................................................. 91
Display cable....................................................................................................................................................................... 92
Removing the display cable ..................................................................................................................................... 92
Installing the display cable ........................................................................................................................................93
Display back-cover............................................................................................................................................................95
Removing the display back-cover........................................................................................................................... 95
Installing the display back-cover............................................................................................................................. 95
Chapter 3: Drivers and downloads............................................................................................... 97
Chapter 4: BIOS setup.................................................................................................................98
BIOS overview................................................................................................................................................................... 98
Entering BIOS setup program........................................................................................................................................ 98
Navigation keys..................................................................................................................................................................98
One time boot menu.........................................................................................................................................................99
System setup options.......................................................................................................................................................99
Updating the BIOS.......................................................................................................................................................... 109
Updating the BIOS in Windows.............................................................................................................................. 109
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 109
Updating the BIOS using the USB drive in Windows........................................................................................ 109
Updating the BIOS from the F12 One-Time boot menu....................................................................................110
System and setup password...........................................................................................................................................111
Assigning a system setup password....................................................................................................................... 111
Deleting or changing an existing system setup password.................................................................................111
Clearing CMOS settings................................................................................................................................................. 112
Clearing BIOS (System Setup) and System passwords..........................................................................................112
Chapter 5: Troubleshooting........................................................................................................ 113
Handling swollen Lithium-ion batteries....................................................................................................................... 113
Dell SupportAssist Pre-boot System Performance Check diagnostics...............................................................113
Running the SupportAssist Pre-Boot System Performance Check............................................................... 114
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