Just for furder reference I want to say

Just for furder reference I want to say that I have same problem as topicstarter.
I suspected on dead south, took him of, but, shortcut on U31 to null remained.Of course, I tested U31 and concluded that he is ok!
I put this SIS962LUa south on other mobo and he was working.
I took of all smd (capacitors and resistors) near southbridge, but, there is still shortcut on U31.
I don`t know what is problem, but south isn`t!