The first question is why are you resoldering it?

What was not working?

That should spur some help from the masters...

Be careful if you resolder. My system wasn't working as it should. I stumbled upon some info about resoldering so I went ahead and did it. I ruined my CCU. Found out later the CCU, at a minimum, wasn't the only problem (if it was a problem at all we'll never know because it is dead now).