Z68X-UD3H-B3 no HDMI screen output

[colt45]

Hi,
I'm new to this forum and encounter a problem with this Mobo.
Mobo Z68X-UD3H-3B with latest upgraded firmware and standard settings
8GB Corsair Vengeance 1600
Samsung 830 - 128Gb with OS Windows 7 installed - no RIAD - AHCI mode
Second HD Seagate 1Tb as data disk
i5 2500K - not overclocked
Monitor iiyama 26"
Problem: everything works fine when I use the DVI port on the mobo.
When I connect a HDMI cable from the monitor to the board I get no screen anymore (I think the computer starts up normally but I cant see anything)
When I disconnect the DVI and leave the HDMI connected and reboot, I can't even go into the Bios - no screen at all.
So the only way to work with this computer is to keep the DVI connected... but I rather 
Somebody a solution or what am I doing wrong?
Thanks.
John

[RobD]

One of the buttons on the front bottom edge might be for input select [2nd from left in one manual I read]
Successive presses will cycle through the different inputs - dvi > hdmi > vga

[colt45]

Hi,
I did allready switch between the 3 possible settings on the monitor, sorry but that is not the solution I was looking for. It has to do with the Intel HD Graphics 3000. I allready upgrade the driver - no succes.
When I look on the internet, many people have problems with this matter, even with other mobo's.