I am having a problem with my sony laptop,the problem is with the VGA,I have it hooked up to my flat screen lcd TV,it was working fine,and one day it just stopped,now on the TV it says"no video signal"so I hooked up my other laptop to the TV and tried the VGA an it works fine,so how do I fix the VGA in the sony,I didn't change any setting,can anyone help,thanks for any help.