Libreboot is a free BIOS or UEFI replacement (free as in freedom); libre boot firmware that initializes the hardware and starts a bootloader for your operating system. It's also an open source BIOS, but open source fails to promote freedom; please call libreboot free software. Since 14 May 2016, Libreboot is part of the GNU project.
Install
./lenovobios_fistflash bin/YOURBOARD/YOURROM
reboot
./lenovobios_secondflash bin/YOURBOARD/YOURROM