keep getting BOOT DEVICE NOT FOUND - PLS INSTALL AN OPERATING SYSTEM ON YOUR HARD DISK. HARD DISK

[Jypsey]

I can't seem to solve this problem .. BOOT DEVICE NOT FOUND - HARD DISK (35O) - PLS PLS HELP ME .. I FEEL LIKE I'VE LOST EVERYTHING .. It's passed all the tests - the only thing I can't find is the "optone ??" something .. I have no idea how to fix this .. 

[Nal_NR]

Hi @Jypsey,

Welcome to the HP Support Community. 

I'd be happy to help you! 

I understand that you are having issues with the BOOT DEVICE NOT FOUND error.

If the Hard Disk Error boot device not found is displayed on a black screen, use the following procedures to try to resolve the error.

Restore BIOS default settings

To restore the BIOS default setting, open the BIOS Setup screen.

You may also refer to this video.

Turn off the computer and wait five seconds.

Press the power button to start the computer and repeatedly press the f10 key to enter the BIOS setup menu.

On the BIOS Setup screen, press f9 to select and load the BIOS Setup Default settings.

Press f10 to Save and Exit.

Use the arrow keys to select Yes, and then press Enter when asked to Exit Saving Changes.

Follow the prompts to restart your computer.

For further assistance, click here. 

Hope this helps! Keep me posted for further assistance.

 Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.