Dell OptiPlex All-in-One Plus 7420 - Page 5

Power-supply unit............................................................................................................................................................. 76
Removing the power-supply unit.............................................................................................................................76
Installing the power-supply unit............................................................................................................................... 77
Chapter 6: Removing and installing Field Replaceable Units (FRUs)............................................ 79
Power-supply fan.............................................................................................................................................................. 79
Removing the power-supply fan..............................................................................................................................79
Installing the power-supply fan................................................................................................................................ 82
I/O bracket......................................................................................................................................................................... 85
Removing the I/O bracket........................................................................................................................................ 85
Installing the I/O bracket...........................................................................................................................................86
Speakers.............................................................................................................................................................................. 87
Removing the speakers..............................................................................................................................................87
Installing the speakers................................................................................................................................................88
Heat sink..............................................................................................................................................................................89
Removing the heat sink............................................................................................................................................. 89
Installing the heat sink............................................................................................................................................... 90
Processor............................................................................................................................................................................. 91
Removing the processor.............................................................................................................................................91
Installing the processor..............................................................................................................................................92
System board..................................................................................................................................................................... 94
Removing the system board..................................................................................................................................... 94
Installing the system board....................................................................................................................................... 98
Power-button and I/O board.........................................................................................................................................101
Removing the power-button and I/O board........................................................................................................ 101
Installing the power-button and I/O board......................................................................................................... 102
Audio board....................................................................................................................................................................... 104
Removing the audio board.......................................................................................................................................104
Installing the audio board.........................................................................................................................................105
Display-assembly base....................................................................................................................................................107
Removing the display-assembly base....................................................................................................................107
Installing the display-assembly base......................................................................................................................108
Chapter 7: Software................................................................................................................... 110
Operating system............................................................................................................................................................. 110
Drivers and downloads.................................................................................................................................................... 110
Chapter 8: BIOS Setup................................................................................................................111
Entering BIOS setup program........................................................................................................................................ 111
Navigation keys..................................................................................................................................................................111
F12 One Time Boot menu................................................................................................................................................ 111
System setup options......................................................................................................................................................112
Updating the BIOS.......................................................................................................................................................... 125
Updating the BIOS in Windows.............................................................................................................................. 125
Updating the BIOS using the USB drive in Windows........................................................................................ 125
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 125
Updating the BIOS from the F12 One Time Boot menu................................................................................... 125
System and setup password......................................................................................................................................... 126
Assigning a System Setup password.................................................................................................................... 126
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