Dell XPS 13 9315 Service Manual page 4

Boot Sequence...................................................................................................................................................................39
One time boot menu......................................................................................................................................................... 40
System setup options.......................................................................................................................................................40
System and setup password.......................................................................................................................................... 56
Assigning a system setup password....................................................................................................................... 56
Deleting or changing an existing system setup password................................................................................. 57
Clearing BIOS (System Setup) and System passwords.....................................................................................57
Updating the BIOS............................................................................................................................................................ 57
Updating the BIOS in Windows................................................................................................................................ 57
Updating the BIOS using the USB drive in Windows..........................................................................................58
Updating the BIOS in Linux and Ubuntu................................................................................................................ 58
Updating the BIOS from the F12 One-Time boot menu.................................................................................... 58
Chapter 5: Troubleshooting.........................................................................................................60
Handling swollen Lithium-ion batteries........................................................................................................................ 60
Locate the Service Tag or Express Service Code of your Dell computer ............................................. 60
System diagnostic lights...................................................................................................................................................61
SupportAssist diagnostics................................................................................................................................................61
Built-in self-test (BIST)................................................................................................................................................... 62
System board built-in self-test (M-BIST)............................................................................................................. 62
Display panel power rail built-in self-test (L-BIST)............................................................................................. 62
Display panel built-in self-test (LCD-BIST)...........................................................................................................63
Outcome........................................................................................................................................................................ 63
Recovering the operating system................................................................................................................................. 64
WiFi power cycle............................................................................................................................................................... 64
Drain residual flea power (perform hard reset)......................................................................................................... 64
Backup media and recovery options.............................................................................................................................65
Real Time Clock-RTC reset......................................................................................................................................... 65
Chapter 6: Getting help and contacting Dell................................................................................ 66
4 Contents