boot device not found

[aalex1]

Boot device not found 

Please install an operating system on your hard disk

Hard disk <3F0>

[Riddle_Decipher]

@aalex1 Due to the current global COVID-19 situation, we're seeing an influx of customers coming in for support and we appreciate your patience.

That said, Please follow the below steps to identify and resolve this concern:

Step 1: Perform a hard reset

HP Notebook PCs - Performing a Hard Reset or Forced Reset

Step 2: Restore BIOS default settings

Step 3: Test the hard drive using HP PC Hardware Diagnostics UEFI (In your case, Skip to Step 4)

Step 4: Re-seat the hard drive (here's a generic video that shows how to re-seat the drive: Click here) > 3F0 error represent a hardware malfunction, a reseat should help, if it doesn't or you aren't comfortable, please Contact HP as the next step will not help.

Step 5: Perform an HP System Recovery

If none of the above actions resolved the error condition, back up your personal data and then perform an HP System Recovery on the notebook. See one of the following documents for instructions:

Click here for instructions.

FOR DETAILS & FURTHER INSTRUCTIONS, USE THIS LINK: CLICK HERE

(By the end of this article all the issues should be resolved)

P.S: Welcome to HP Community 😉

Keep me posted, as I (Or a trusted colleague) shall follow-up on this case to ensure the concern has been addressed, 

And your device is up and running again, only in case you don't get back to us, first! 

That said, If the information I've provided was helpful, give us some reinforcement by clicking the solution and kudos buttons, 

That'll help us, and others see that we've got the answers!

Good Luck.