My Lenovo S30 0568 did not boot and still on board screen display F2

[muhanad]

Dears please help me 
My Lenovo s30 0568 did not boot and still on board screen display F2 code  two peep continuous
How this Happen 
1- I download the last firmware of bios the version from that can update from my windows 10, I installed the update as instruction and every think was OK, my PC restart and it boot very normal.
2- I downloaded the (Intel Management Engine Firmware Update Tool -  Systems for windows 7) and run it after less than a minute the tool got error and stop.
3- after that I install the software of Lenovo system update and run it, it download some package related to Intel engine or something like this, the tool ask for restart the pc, after restart, the pc boot with no screen and the code in board Lcd 62 code.
4- I do the reset Cmos procedure but the problem still.
5- I do the bios recovery from USB the screen show the bios recovery and update the bios done , the pc shutdown , I set the jumper to normal state but the pc boot with no screen again but the in board Lcd List "F2" with two peep and it hang in recovery mode while i reset the jumper in normal position 
So please help me to know what happen and what I do to solve this problem
Many thanks