Well there are lot of solutions you will stumble upon randomly (and issues often solve themselves seemingly) so I would be careful to not misattribute the cause :- ). You might have worn your socks reversed on that day too.
Well guy already tried 20 different things. Whats the harm in misattributing the cause if the problem is solved along the way. Unplug the 8 pin, test, if it does not work plug it again. Its 3 minutes work. Its not gonna burn the cpu. Though I think He solved the problem since He is not here for a long time hehe.