Boot Device Not Found

[JunMora]

How to restart my PC Boot Device Not Found – Hard Disk (3F0)

[Prométhée]

Hello

[start]
This is an automatic response
in order to avoid writing the same thing each time

Some elements may therefore not apply to you 
To be able to answer you effectively, we need some information

we need the exact model of your computer, and the product number
To find it follow this
for a desktop computer

HP Desktop PCs - How Do I Find My Model Number or Product Number? | HP® Customer Support
and for a laptop
HP Notebook PCs - How Do I Find My Product Name or Number? | HP® Customer Support

Give the full name with the product number P / N

this is not a model:
HP Desktop M01-F1xxx
the requested product number must look like this
Product Number: 9EE50AA # ABA
the model corresponding to this number will therefore be
HP Desktop - M01-F1033wb

Give the full version of windows

for windows 10 type winver in the search box
if you give the best information
your problem could have a solution more quickly (depending on the difficulty, of course)
Learn how to use the Community

Advice for asking the "Very Best Question"

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 3F0 boot device not found error displays on a black screen in Windows 10

in the meantime you can consult this and try this

https://support.hp.com/us-en/document/c06201699

Procedure 2: Ensure Legacy Support, under Boot Options, is DISABLED.

NOTE: If legacy boot support is enabled, you will NOT be able to see the Intel Optane entry as described in Procedure 3.

1. Start or restart the computer.
2. Press F10 repeatedly during start up to enter the BIOS configuration utility.
3. Check Legacy Support and disable if it is enabled:
   
   System Configuration > Boot Options > Legacy Support
   
   or
   
   Boot Options > legacy Support
4. If Legacy Support is DISABLED, skip to Procedure 3, Step 3.

[VH2000]

It is just the basics: In UEFI-Mode a MBR-Drive will not be detected.

So go into BIOS and check in the security tab or in advanced settings if Legacy is enabled.
If you have an MBR-Drive you have to enable that!
Also switch off secure boot because if the 1st step doesn't help you have to use an PE-Medium to make some BCD modifications.