HP laptop Boot Device Not Found Error (3FO) or Hard disk not Exist error "solution for both issue.
(3F0) caused due to the failure of internal hard disk …buy new hard disk bro….
Alternative :goto boot option.. then disable legacy support … then save it.. restart the ur PC… if u have luck it will help you
BOOT DEVICE NOT FOUND error is commonly seen during the process of booting operating system. As it indicates, Windows OS can't find a bootable device to boot from, usually, it can be an internal hard drive, external usb drive, optical CD/DVD ROM drive and network adapter.
Once the error shows up on your computer screen, the computer can on longer startup normally. Hence, you should take prompt measures right now to figure out what causes the bootable drive missing. Here in the following, you may use it as reference.
Wrong boot order in the BIOS
Hard disk connection problem
System files or boot files unknowingly damaged
Master Boot Record (MBR) or boot sector is damaged on the bootable disk
Other outside attacks, such as third-party system protected application, virus, malware, etc.
With those factors in mind, you're suggested to start out fixing boot device not found error by following the recommended solutions one by one. Hope at least one method will help you out.
Fix 1. Check and reset bootable device of the operating system in BIOS
To exclude the possibility that your computer is wrongly set to boot from unbootable disk or device, you need to check the BIOS settings. Here, we take the hp computer as an example. To restore BIOS settings and make Windows OS detects the bootable hard disk, do as follows.
1) Press the Power button and press F10 key repeatedly to enter teh BIOS setup menu. (depending on different manufacturer, instead of F10, it's maybe ESC, F1, F2, F8...)
2) On the BIOS Setup screen, press F9 to select and load the BIOS Setup Default settings.
3) Press F10 to Save and Exit.
4) Use the arrow keys to select Yes, then press Enter when asked Exit Saving Changes?
5) Follow the prompts to restart your computer.
If resetting the boot order solves the problem, good luck for you. If not, the issue can be a little tricky. Pay some effort with the workaround of How to use Bootrec exe in the Windows RE to troubleshoot startup issues.
I know that the tutorial is so complex that many average users can't read further after the fist paragraph. In order to make the troubleshooting a little easier, you can take out the internal hard drive that was used to boot Windows, and connect it to a normally functioned computer.