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
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9 Ways To Reset / Remove BIOS Password For Lenovo, HP, Dell, Acer, Asus Laptops
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No battery after BIOS update - HP Support Community - 7462226
No battery after BIOS update - HP Support Community - 7462226