Problems on startup ******FIXED*******

Well let me get into a little detail on what I did so far befoe the problem.
I had bought a Broadway casing with a 550W psu, that burns out I get the ANtec EA-650 PSU.
I put gt a Antec 300 case and had problems with the psu not working. Send it in for an RMA 3 weeks later have another EA-650 PSU. It does not work. So I go out and buy a corsair 750 W PSU. IT works on my system.
I hook my video card to my monitor but get no image. I hook an older stock GPU of the Dell C521 or something like that and no image.
BTW I am using a 4830 HD sapphire.
I think it may be my motherboard, but all my fans are working(including gpu fan) and the computer is starting up.
Is it possible for certain parts of the motherboard to short circuit and not other parts?
I am using a A74MX-K from foxconn
EDIT- Also, normally on starup my motherboard does 1 *beep* to let me know that it is working properly.
EDIT Again-
I think the faulty power supply may of short circuited my motherboard. Hopefully antec will refund this considering I bought a new psu that works. (Expect for the gpu not putting a signal out.)
I had bought a Broadway casing with a 550W psu, that burns out I get the ANtec EA-650 PSU.
I put gt a Antec 300 case and had problems with the psu not working. Send it in for an RMA 3 weeks later have another EA-650 PSU. It does not work. So I go out and buy a corsair 750 W PSU. IT works on my system.
I hook my video card to my monitor but get no image. I hook an older stock GPU of the Dell C521 or something like that and no image.
BTW I am using a 4830 HD sapphire.
I think it may be my motherboard, but all my fans are working(including gpu fan) and the computer is starting up.
Is it possible for certain parts of the motherboard to short circuit and not other parts?
I am using a A74MX-K from foxconn
EDIT- Also, normally on starup my motherboard does 1 *beep* to let me know that it is working properly.
EDIT Again-
I think the faulty power supply may of short circuited my motherboard. Hopefully antec will refund this considering I bought a new psu that works. (Expect for the gpu not putting a signal out.)