Bc019nl can't boot after bios update

[Bru_no]

Hello,

Yesterday i updated the bios of my pc whit the last version (f46 rev. a)

All worked right, the update finished whit no problems but after the reboot the pc is stuck at boot whit no error lights or sounds, the screen is completely black whit no backlight but the fans are working, i tryed the recovery keys (win+B and win+V) but nothing appens, i also disassembled the pc to remove the battery cable and the CMOS battery and pressed the power boutton for 1 minute, nothing changed 

Connecting the pc to my TV trought HDMI dosn't showns anithing

[Bru_no]

The bios i have installed is the f 56 not the 46