How do I fix boot device not found?

To fix boot device not found 3F0 error, follow these steps:

1. Press the Power button to start the computer, and immediately after this, repeatedly press the F10 key to enter the BIOS setup menu.
2. To load and restore BIOS Setup Default settings, press F9 on the BIOS setup menu.
3. Once loaded, press F10 to Save and Exit.