hello, i have quite a confusing problem here...My graphicscard an MSI GeForce 6800 GT PCI-Express refuses to boot up with a 21" Compaq P1100 monitor :cry: but works just fine with the Belinea 19" im using right now. When i use the 21" the graphicscard fan and powerled switches off, and the monitor gets no signal.. Any idea what's causing this?