[MinnowBoard] no suitable video mode found booting in blind mode

[Ken Tait]

There is one other trick you can try to verify that this is the real 
problem with your setup.

place a switch in the + line of the wallwart going to the barrel jack.

Turn switch off, plug in barrel jack, plug in wall wart. Wait 5 seconds, 
then turn on the switch. It the board comes up then the supply is right 
on the edge of being large enough.  What you are doing with this test is 
allowing the wallwart to come up to full voltage and charge it's caps 
before applying a load to it.

Another thing I noticed here on all these boards is that the software on 
boot is not quite right..Someone is making the ASSumption that things 
turn on instantaneously in hardware so the software has no or minimal 
delays on boot. This needs to change. For this type of setup there 
should be a stall delay of at least 800ms on first power application 
before it checks for a boot device or anything else..

Hope this helps
Ken