Hi Ajjalid,
I'm afraid you're not going to find a graphics card inside your laptop. That computer uses the Intel HD Graphics 3000 coprocessor which is integrated into Intel's Sandy Bridge CPU. It would be incredibly rare for the graphics chip part of your processor to fail and leave the rest of the CPU running fine, so I would first suspect software as the source of the problem rather than a hardware failure.
You might try updating your drivers before you look into tearing your system apart to look for a non-existent graphics card.