The Intel i5-480M Processor indeed comes with HD Graphics http://ark.intel.com/products/52952/Intel-Core-i5-480M-Processor-%283M-Cache-2_66-GHz%29 this included on the processor, and however, since your computer comes with Nvidia card, this is disabled electronically. You will need to check with Sony about this and check if there is any setting at BIOS level to enable Intel graphics instead.
If there are no settings to enable the Intel video, this means that your BIOS has blocked such functionality
I am sure just like you said, there is an embedded graphics card on my processor.
There is no option to enable it from BIOS. Will sony be able to unlock advanced features in my BIOS and enable the graphics card?
Or is there any other way I can do that? Just asking to know If you have ever heard of such situations and if this has ever been achieved?