Boot Device Not Found, Hard Disk (3F0), Got the USB Flash drive but still won't boot up

[roman2424]

Had this desktop all in one PC for a year, and then gave it to my grandparents as a gift.

They mentioned that sometimes there was outages and they had to reset the PC to get it working right, and after the last outage they had roughly a month ago, the computer kept showing this error of Boot Device Not Found, Hard Disk (3F0)

I've followed the steps online on the HP Website and even was able to successfully download the BIOS for the computer, but the computer is not reading the BIOS off the USB or just simply wont boot up via USB and I really want to fix this for them, any bit of info can help

[Deep_World]

Hi @roman2424,
 
Welcome to the HP Support Community!

Thanks for reaching out!

I  understand how  this must be, especially since you set up the PC as a gift for your grandparents. You’ve already done a great job trying the BIOS update route, so let’s walk through a few more focused steps together. 

Could you please share the exact HP model number of the desktop all‑in‑one? 
 

In the meantime, here are a few things you can try:

1. Check BIOS boot order Restart the PC, press F10 to enter BIOS Setup, and confirm that the internal hard drive is listed as the first boot device. If it isn’t, adjust the order and save changes.
2. Run HP Hardware Diagnostics Power on the PC and immediately press F2 or Esc → F2 to launch diagnostics. Run the “Hard Drive Test” to see if the disk is being detected and whether it passes.
3. Try USB recovery media If the BIOS isn’t reading your USB stick, make sure it’s formatted as FAT32 and created using HP’s official recovery tool. A standard BIOS file alone won’t boot the system  it needs a recovery image.
4. Check Secure Boot settings In BIOS, toggle Secure Boot off temporarily and enable Legacy Boot. This can sometimes allow the system to recognize the drive or USB.

I hope this helps.