Boot

[EzeyE75]

I'm doing the steps to try to recover my operating system from error code Boot device not found 3F0

[WAWood]

@EzeyE75 

I read your post about no boot device found and wanted to help.

These problems are generally due to one of two basic problems:
1) Failed hard drive
2) Corrupted/missing boot loader files

As to the first, please follow the directions in this link for testing your hard drive http://support.hp.com/us-en/document/c00439024

If that confirms your drive has failed, then you need to replace it. Please report back if that is the case.

As to the second, you will need access to a working PC for this step in order to create the media needed to repair your PC boot loader.

Once you have that, please download and create Win10 install media from this link: http://windows.microsoft.com/en-us/windows-10/media-creation-tool-install?ocid=ms_wol_win10

Note that when you go do download and build install media, the tool defaults to matching what is already installed on your PC (as in, Home for Home, 64-bit for 64-bit). While you CAN change these settings, do NOT. If you do, the resulting media will be different and will force you to enter a NEW product code!

Boot from the media you created, and follow the directions in this link: http://www.tenforums.com/tutorials/2294-advanced-startup-options-boot-windows-10-a.html

You will need to go to the Advanced Options screen and click on Startup Repair. You will probably have to run Startup Repair three times for it to fix all the boot loader problems.

When done, your PC should boot OK. If it does not, there is a more serious problem.

[EzeyE75]

I already tested the hard drive and passed, so I will do your second proposal. Thank you