[Irinikus]

This is probably due to the fact that the system isn't fitted with a DCD and you're using a DVI to HDMI adapter off the primary DVI output!

The system switches to an analog output as it boots and then switches back to a digital output once the OS comes up.

Try a DVI to VGA adaptor and this text port should show up during boot.

If the V12 is fitted with a DCD, then the output remains digital off the DCD's DVI ports.

Or use a DVI cable with a monitor that accepts DVI-A (Not a very common feature nowadays!)