iQon computer boot problem?

Hi There

Today, I had my iQon computer (purchased about last september) give me 2 blue screens on boot. Then, after going into Windows and running a defrag, i opted to reboot again before using it. I clicked on the Start Menu, clicked the power button, and the computer turned off.

Since then, I have been able to turn on the computer, but I get no Input to my monitor. I have plugged in a different computer ot hte same monitor and it works fine.

Anyone heard of this before? Any ideas? Is it something obvious I have missed, or is the motherboard/video card fried itself?