ubuntu - Dell Inspiron R15 3521 BIOS doesn't show the option to boot from USB - Super User
How to Access, Navigate, or Update the BIOS or UEFI | Dell US
Why the screen below appear when I boot my dell Inspiron 7559? And dell logo doesn't appear? Therefore I can't access BIOS utility to boot the laptop from a USB flash drive. :
Windows 10 no arranca Dell Inspiron 3670 - Dell Community
How to Access, Navigate, or Update the BIOS or UEFI | Dell US
Dell Inspiron 15, How to Enter BIOS Utility System In Dell Inspiron 15 [Full Tutorial] - YouTube