Thanks to Bruno's site and this board. I was able to fix the LKM on my son's 525. I used some solder braid to remove the old solder. It's pretty cool stuff. It looks like a braid of copper.You place it on the spot you want to remove solder. Then, you touch the iron on top and in a few seconds, the old solder starts wicking up the copper braid.

Works great and cheap too! My kind of product.