i'm not sure what "lcd output" means exactly. obviously you don't mean dvi or else you wouldn't have a problem. also, your monitor has inputs and your graphics card has outputs, not the other way around like you wrote. what kind of connector is on your monitor? vga?
if it looks like this it's vga:

just buy a vga/dvi adaptor, you can find them most everywhere that sells computer accessories.
otherwise, post more info about what type of connector your lcd has.