Bear in mind that leaked electrolyte can potentially etch away just the solder mask, making it very easy to inadvertently bridge tracks when recapping. That happened to me with my A600: there was a clicking sound in the audio due to an interrupt line being bridged to AVref.
https://www.amigapcb.org/ is super-handy for identifying potential trouble spots. Removing all the leaked electrolyte can be quite difficult, and in severe cases it can end up conductive (as well as corrosive) due to the dissolved copper. Good luck!
