If you say that you have nothing on screen but you hear the windows sound when you stat ..it is a display issue ..probably the connection cable is to blame or the inverter went bad .(for the display )..try the secondary vga monitor and use a regular monitor and see if it works ok ..if it does it is the display to blame ..and like I said either diplay inverter or the display itself ..and it can be changed in both cases..or ..it may be just the connecter cable ..
If you have no image on secondary monitor..try to press fn =f4 or f5 or f7 ..(usually it indicates the f key for the enabling of the monitor ) but it is one of these ..If the secondary monitor shows no signal and no matter what you try it has no picture..it means the video card is out of functions and need to be changed..
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