Dell OptiPlex 5400 Service Manual page 5

Installing the audio board...........................................................................................................................................80
Antenna modules................................................................................................................................................................81
Removing the antenna modules............................................................................................................................... 81
Installing the antenna modules.................................................................................................................................82
Display panel....................................................................................................................................................................... 83
Removing the display panel.......................................................................................................................................83
Installing the display panel.........................................................................................................................................85
Middle frame.......................................................................................................................................................................87
Removing the middle frame...................................................................................................................................... 87
Installing the middle frame........................................................................................................................................ 88
Chapter 3: Drivers and downloads............................................................................................... 90
Chapter 4: BIOS setup................................................................................................................. 91
Entering BIOS setup program......................................................................................................................................... 91
Navigation keys.................................................................................................................................................................. 91
One time boot menu..........................................................................................................................................................91
System setup options.......................................................................................................................................................92
Updating the BIOS.......................................................................................................................................................... 100
Updating the BIOS in Windows.............................................................................................................................. 100
Updating the BIOS in Linux and Ubuntu.............................................................................................................. 100
Updating the BIOS using the USB drive in Windows.........................................................................................101
Updating the BIOS from the F12 One-Time boot menu....................................................................................101
System and setup password......................................................................................................................................... 102
Assigning a system setup password......................................................................................................................102
Deleting or changing an existing system setup password............................................................................... 103
Clearing CMOS settings.................................................................................................................................................103
Clearing BIOS (System Setup) and System passwords.........................................................................................103
Chapter 5: Troubleshooting....................................................................................................... 104
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 104
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 104
Display built-in self test..................................................................................................................................................104
Power-Supply Unit Built-in Self-Test ........................................................................................................................105
System-diagnostic lights................................................................................................................................................105
Recovering the operating system................................................................................................................................106
Real Time Clock-RTC reset........................................................................................................................................ 107
Backup media and recovery options........................................................................................................................... 107
WiFi power cycle..............................................................................................................................................................107
Chapter 6: Getting help and contacting Dell...............................................................................108
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