help! i'm getting nothing at all from the monitor and want to be really sure of what parts to replace. this is a socket 478 P4 northwood 2.66ghz computer so its very old. i have a customers computer with nothing showing up on monitor, no picture or anything from the monitor. it gives no signal notice if unplugged but nothing at all otherwise. all drives power up fine and activity lights are flickering, all fans working. tried swapping out to a new known to be working video card and still nothing on the screen. tried putting the video card it had into another computer and it wouldnt work so the video card has to be bad but something else is still screwed up. im guessing the board is bad but im not sure, the psu tested ok and voltages look ok so before i go and buy another motherboard i want to know how i can be sure its not the cpu? (i have no other boards to try the cpu in) i tried running the cpu for a minute without the cpu fan and can feel the heatsink was getting warm so it is putting out heat for whatever that may indicate. i dont want to buy parts for something this old unless im sure about it because you cant resell a 478 board.