Msi z77 mpower stuck in b2 when no display attached

I want to boot without having a display attached. post is stuck in b2. If I attach hdmi cable to display boots fine.
Updated to latest bios 17.7 - still the same ... Any pointers???

0xB2 Legacy Option ROM Initialization
Quote
I want to boot without having a display attached. post is stuck in b2. If I attach hdmi cable to display boots fine.
As far as I can recall, there is no way to stop the POST sequence from searching for either IGD or PEG graphics and still proceed to boot an OS. Graphics will be required to set up the UEFI/BIOS settings, boot device, and other housekeeping chores anyway. How are you going to load the chipset and other drivers? Once in the UEFI/BIOS and the graphics settings are disabled, it 'might' work as you want. Only way to tell if it is in the OS then would be the HDD LED or the mainboard DeBug LED showing AA, A0, or the CPU temperature depending on the UEFI/BIOS version.

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