Ok, quick facts and will answer questions if I miss anything. In Laws asked me to look at their Macbook, I work on PC's mainly so took into apple to have them look it over. Told it needed to be sent off to the depot. Had them pop the case and verify no water damage, the girl came back told me there was no sign of water damage and that it would be a flat rate of 280. So I gave them the go ahead to send it off. Get a call 6 days later that they found microscopic corrosion and that this shows water/liquid damage, but there were no signs of water/liquid damage on the case or metal inside the laptop, I asked for a pic to be sent to see what they are talking about. So tell me, do you see any corrosion in this pic, and how should I go from here, the price told to me was 755, I so far have them down to 430, and they are holding firm there.