Thanks for the link Scott, that will be helpful. I've got all the tools I need to crack the case and I've made myself an anode discharge tool, it was more the soldering side of things that I was interested in.

Is it best to completely remove the existing solder from a joint or should I reflow and add solder?

Also, I need to resolver a tiny joint on the keyboard where the cable connection socket connects to the keyboard's circuit board. Can a normal iron be used for this or is there some other way?

Thanks!