●
BIOS executable file that you downloaded from the Dell Support website and copied to the root of the USB key
●
AC power adapter connected to the system
●
Functional system battery to flash the BIOS
Perform the following steps to execute the BIOS update flash process from the F12 menu:
CAUTION:
Do not power off the system during the BIOS update process. Powering off the system could make
the system fail to boot.
Steps
1. From a power off state, insert the USB key where you copied the flash into a USB port of the system .
2. Power on the system and press the F12 key to access the One-Time Boot Menu, Highlight BIOS Update using the mouse or
arrow keys then press
Enter
.
3. The flash BIOS menu will open, and then click the
Flash from file
.
4. Select external USB device.
78
System setup
Содержание Inspiron 14 5402
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