How to fix boot device not found – hard disk (3f0) error when booting your computer or laptop. The issue can be that the system is looking to another boot device like a usb key or cd instead of your hard drive (fix in bios boot options). Hard Disk (3f0) error code on boot can be from a dead or dying hard drive. This boot error could mean that your bios option are set to legacy and not secure boot or UEFI boot.
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