I have a question on how to fix "No bootable Device - - Insert boot disk and press any key"

[Ehkey]

i have a few questions about how to fix that but first, before i got this problem. i have a problem with "The selected boot device failed. Press <Enter> to continue. So i check some websites and i start watching some solution on youtube and i found some. I found a video that shows how to fix it. So i did it too. I change the legacy support and enabled it. after that it reset itself and then the other problem pops up.. the No bootable Device - - Insert boot disk and press any  key.. so im not sure how to fix it. Im not sure if the boot is the problem or something broke in the system or something. I really hope you could help me. thank you! 

[WAWood]

@Ehkey 

If your laptop came with Win10 preloaded, then it was configured to boot in UEFI mode -- and forcing the change to Legacy or CSM will only guarantee that it will NOT boot anymore.  Just doing what it suggested on the Internet is not always the best approach.

You need to change the mode back to UEFI -- or it will never boot again.

This issue is often due to a failing drive.

So, let's check that first, because if it is failing, it would need to be replaced and there is no point then in doing anything else until we confirm that.

If your PC is new enough to support UEFI, you can use these steps to test the HDD (Hard Disk Drive): http://support.hp.com/us-en/document/c00439024

If not, to check the HDD you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) Press the Function key for testing the hard drive (usually F2) and let it run.

If the drive checks out OK, then report that and I can provide you options for reinstalling Windows on your PC.

Please note that if your model has an SSD instead of an HDD, these diagnostics might not work properly.

[K-klein]

Thank you for your help!  Here’s the screen after doing the Hardware Diagnostics.  

how I should I proceed to resolving this boot device error?