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Follow this Recovery instruction:
1-Power off laptop and dettach AC adapter and battery.
2.Insert prepared USB stick with mod to USB port (please check that it is not USB 3.0)
3.Press and hold on keys Esc+Fn (keep it until 6th step)
4.Press Power button.
5.After 10-15 sec you may hold off keys Esc+Fn
6.System will boot from Usb stick
7.The Recovery procedure take 3-5 mins and active with black screen.
8.Wait until USB stick stop flashing and then after 1 min laptop turn off automatically.
9.Turn on laptop and check new bios.