first copy bios file to blank USB drive with format fat32 ( only 1 bios file in the USB drive no folder) this is the bios recover, I use this every day at work
Take out power connect to main board, take out memory, battery, No hard drive or any optical device, take out the yellow jumper for 30 min.
Now plug in all power, memory, battery, do not plug in the yellow jumper or hard drive, dvd drive. This is intel bios recover mode
insert USB drive to usb port power on wait for 2 min you will see screen for bios update, If you get error code on main board LED like 69 ( bios error) go back to do the same thing but this time use only 1pc of memory at first blue memory slot.