Dell Latitude 3540 - Working on Your Computer; Before Working Inside Your Computer

Entering BIOS setup program.........................................................................................................................................73
Navigation keys..................................................................................................................................................................73
One time boot menu......................................................................................................................................................... 73
One Time Boot menu........................................................................................................................................................74
System setup options....................................................................................................................................................... 74
Updating the BIOS............................................................................................................................................................ 84
Updating the BIOS in Windows................................................................................................................................84
Updating the BIOS in Linux and Ubuntu................................................................................................................ 84
Updating the BIOS using the USB drive in Windows..........................................................................................84
Updating the BIOS from the F12 One-Time boot menu.................................................................................... 85
System and setup password...........................................................................................................................................85
Assigning a system setup password....................................................................................................................... 86
Deleting or changing an existing system setup password.................................................................................86
Clearing CMOS settings.................................................................................................................................................. 87
Clearing BIOS (System Setup) and System passwords...........................................................................................87
Chapter 5: Troubleshooting.........................................................................................................88
Handling swollen Lithium-ion batteries........................................................................................................................ 88
Dell SupportAssist Pre-boot System Performance Check diagnostics................................................................88
Running the SupportAssist Pre-Boot System Performance Check................................................................89
Built-in self-test (BIST)................................................................................................................................................... 89
M-BIST...........................................................................................................................................................................89
LCD Power rail test (L-BIST)................................................................................................................................... 90
LCD Built-in Self Test (BIST)................................................................................................................................... 90
System-diagnostic lights................................................................................................................................................. 90
Recovering the operating system................................................................................................................................. 92
Real-Time Clock (RTC Reset)........................................................................................................................................92
Backup media and recovery options.............................................................................................................................92
Wi-Fi power cycle..............................................................................................................................................................93
Drain residual flea power (perform hard reset)......................................................................................................... 93
Chapter 6: Getting help and contacting Dell................................................................................ 94
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