Yeah, looks good apart from the SMC chip.
So probably just that.

The CS4231A isn't as fragile as first thought either.
A few years ago I discovered the issues there were due to
a poorly documented reset pin -- really easy fix.

Again, there's a thread here (somewhere!) on that one.

EDIT: http://empegbbs.com/ubbthreads.php/topics/307148

Worth doing while you are in there.

Cheers