First try hooking up a monitor first after you hook it up on your laptop click on your fn key and your f8 key at the same time if get a picture on your monitor then there is something wrong with your laptop screen!
If it was the video card ...it will appear something on screen like Bios...when accessed..and affect only the installation ...I suspect the lcd connection
so...assuming is nothing inside...take a look on this tutorial
http://www.laptop-repair.info/laptop_screen_repair.html
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