Shaun o :
How are you connecting to the monitor.
Does the monitor have a DVI connector but no hdmi.
And the cable you are using is a hdmi to Dvi.
If so then it is down to the cable and how it is pinned out.
Pure digital has a flat pin on the left of the Dvi cable end looking at the pins..
And analog has a flat pin plus four small pins. if it looks like that then you are trying to send a digital signal to an analog dvi end to the monitor. and why it does not work.
The right cable must be used.
and wired right.
All things i tried:
-Test two monitors and 1 LCD TV, i got analog signal only (VGA adapter).
-Test 2 different VGA cables, 1 new and one old, both works with adapter, tested with two DVI monitors, 2 cables 1 new 1 old, no signal.
-Test in another rig, same test above, same results.
-Test 2 OS's Windows7-8-8.1/Ubuntu 13.04-13.10