So yesterday, I was experiencing constant disconnection after 5 minutes, which I would then proceed to reboot. However, the problem persisted and I decided to turn off wifi and shut off the mac. I think proceeded to take the case off to see if the wires were disconnected. When I opened up the case, there was some glue like substance that was on my logic board. I'm not really sure what it is but I have attached a picture of it. When I turned on my mac once against, there was a problem with my wifi card, when hovered over the wifi icon in my task bar, it said that there was no hardware installed. I took it to the apple store this morning and they said the problem is with my airport card, it needed to be changed. Since it was still under warrenty, I left my mac to be fixed. However, I did not ask why there was glue like substance on my logic board because I'm not sure if it voided my warranty if I said that I opened up the bottom case. Was wondering if anyone could tell me what it is, here is a picture. From my perspective, it seems like something was melted underneath the chip, what do you guys think?