query about the RAM IC in this picture
At first glance it looks like the plastic package has erupted due to overheating and this may well be the case. However, package eruption is usually very localized over the top of the die. The marks could just be glue or some other contaminant but I fear this is just wishful thinking.

If it is (as I suspect) thermal damage then it is unlikely to be the only part damaged and the recorder is no more.

Try to scratch the suface of the IC with a small screwdriver. If pieces of the case flake away leaving pits in the surface of the case, the part is indeed incinerated.