recently my friends computer crashed (not sure why or how) a little while after we put a graphics card it it (msi N520 gt). he got the computer back recently and i needed to put the card into the machine. at first when i put it in i went to install the drivers but they said it wouldn't detect the card. i tried reseating the card and then the computer wouldn't boot the screen just remained blank. now with the card removed it runs fine. is this the cards fault? when it was first installed it worked fine. please help and thanks in advance.