Report "Dell dimension 4600 with GeForce FX 5200. Recently screen freezes up, goes black then comes back on..or sometimes does not come back on and seems to go into power save mode. Can hear computer still on and working, just nothing on the screen.Tried to plug monitor (Samsung 920nw) into on board video plug, doesn't work, tried to enable as second monitor, doesn't work. No viruses, Samsung replaced LCD board (blamed them first). Is it the video card? If I remove that card will the on board video plug work? Tried changing the setting on comp and in windows to use on board plug, didn't work"