Laptop VGA Output Not Working after Disassembly

[cabaou]

So, i was disassembling my Asus N43SL laptop for fan cleaning. Before that, my VGA output port was working fine. Now, I can't use my VGA output port for external display. I followed http/www.scribd.com/doc/96685660/How-to-Disassemble-Your-N43-Series for my disassembling guidance. Please help, Thanks.

 

[Jak Atackka]

Shake the laptop around (gently, of course). Does it sound like there's a loose screw? And do your other ports work?

 

[cabaou]

I dont hear any loose screw. All ports works well. Oh, in that guide, there'a a photo of the motherboard. Which cable do you think that represent the VGA port?