Screen is showing software diagnosis

[PCD-HV]

I went to restart my computer and when it came back up the screen is black and shows PC Hardware Diagnosis .  There are only 4 options  and when i press exit it goes back to  " check to media search" and then goes back to black screen with blue box and says " Boot device not found" 

I want my computer back.... 

[Nirvana_95]

Hi @PCD-HV

Welcome to the HP Support Community. Thanks for bringing this to our notice.

I see that you are facing issues with your system. Do not worry, we are here to fix it.

May I know from when are you facing this issue?

Did you make any hardware or software-related changes to it?

I would suggest you please use the link below and let me know the outcome of it: https://support.hp.com/in-en/document/c06101701 

Hope this helps! Keep me posted. 

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