- Notes, cautions, and warnings
- Working inside your computer
- Removing and installing components
- Drivers and downloads
- BIOS Setup
- Troubleshooting
- Handling swollen rechargeable Li-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System diagnostic lights
- Real-Time Clock (RTC Reset)
- Recovering the operating system
- Backup media and recovery options
- Wi-Fi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell Technologies
XPS 17 9720 Service Manual
F12 One Time Boot menu
To enter the One Time Boot menu, turn on your computer, and then press F12 immediately.
NOTE:It is recommended to shut down the computer, if it is on.
The F12 One Time Boot menu displays the devices that you can boot from including the diagnostic option. The boot menu options are:
- Removable Drive (if available)
- STXXXX Drive (if available)
NOTE:XXX denotes the SATA drive number.
- Optical Drive (if available)
- SATA Hard Drive (if available)
- Diagnostics
The boot sequence screen also displays the option to access System Setup.
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