Ahh, got it. Yeah as near as I can tell that is not corrosion, it's part of the silk screen that came off when they pulled/cut that bodge wire. More scratches and gouges than corrosion. The silk screen on this board is also pretty thick, which is lucky for me. And now that I look at it with that in mind, I totally see why you'd think it's corrosion. From what I have read, it sounds like the Lisa 2/10 actually did not come with a battery, so leakage and corrosion are not as much of a concern with this model, which again, is great news for me!