Boot device not found (3F0)

[Anas42]

My laptop keeps having a blue screen after just 3min after using it with no intense tasks. Now my laptop doesn't boot and just gives me this error:

Boot Device Not Found

Please install an operating system on your hard disk. 

Hard disk (3F0)

F2- System diagnostics. 

So I pressed F2

 when I ran a storage test this message pops up on extensive test:

Smart check : recommend action - executing DST...

Long DST: Not Available

And for quick test it just says quick DST: not available instead of Long DST: Not available

I have already changed the hard drive into an ssd and installed windows on it but i keep having the same problem

Note:Rarely  it boots and it works with no problems with no blue screens  until i turn it off and on again and it has the same problem 

Note 2: sometimes when i turn on the laptop the laptop and screen both turn on but there is nothing on screen and after about 5 min of that the boot device not found error pops up

what dose this mean? And how to solve this problem?

[banhien]

@Anas42 

Please use the following Guide to fix

                   HP PCs - Hard disk 3F0 boot device not found error

Regards.