The Lenovo G50‑80 boot failed. It's showing 'EFI network 0 for ipv4 and IPv6. Boot failed'. Is the hard disk damaged, or can I use it externally? - Quora
パソコンを起動するとEFIPXE0forIPV4bootfail... - Yahoo!知恵袋
How to recover from Boot failed “EFI PXE O for IPv4″ | Wish your life be more juicy