Is this a new graphics card ? or a new build ?
if nothing is coming up on the monitor and the orange light is still on, then some how the monitor is not getting a signal from the graphics card. is the graphics card revomable ?
-edit-
if so, I would take it out..clean off the contact points with a Q-tip and wipe them off real good...
put it back in, and see if it resolves the prob.