Dell 5421 - Boot to USB or BIOS with USB Inserted Stuck on Dell Loading Screen | DELL Technologies
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. :
No bootable devices found in Inspiron 15 3000 series | DELL Technologies
Regarding booting windows from usb | DELL Technologies