I had to have a guide open on another computer (ifixit guide). Wanted to use my 2010 Macbook Pro but it wouldn't boot XD... keeps doing 3 long beeps while off. Had to use the little Chromebook instead.
Seems like Dev & I are endlessly accumulating computer problems...
@rek well done though. I imagine that's not a trivial fix. And yay for iFixIt - such a great resource.