Look like BIOS Version 0046 is screw up
Changelog from KBQ7710H.86A.0048.2013.0108.1855:
* Fixed issue where blank screen appears in operating system when set to UEFI and LVDS is disabled.
* Fixed issue with POST logo resolution when using certain legacy video cards.
* Fixed issue with certain video capture card.
* Updated VBIOS to fix issue where there is no display in DOS.
Unfortunately now upgrade from version 44 to 46 fails 
Flashing image for Intel(R) Management Engine firmware ... FW Update Sample Application ERROR FwUpdateFullBuffer
[failed!]
Flash update failed!
Technical information: (0x8000000000000015, 1550)