Sometimes people make mistakes when soldering (or perhaps you are fixing something someone else put together). You may have to DE-solder a connection or two. There are several methods used for desoldering, but they employ the basic following steps. First, you heat up the iron as if you were soldering, and test to make sure it will melt solder. Then you touch the flat surface of your iron, to the largest surface you are trying to de-solder. Wait until you see the solder flow (it will change in appearance, and you’ll see that shiny liquid look). Now gently pull the component loose from the connector. I say gently – some components may require additional effort, but if you have to pull out a crow bar – you are doing something wrong.