Is this Logic Board Liquid Damaged ör Not?

[ondert]

Hello,

I’ve just got inside my 2015 MacBook Air 13” to clean and re-apply the thermal paste. Then I saw this. AFAIK, red color indicates water/liquid damage while white color tells the opposite. However, I couldn’t decide in this case.
Any ideas?

 

[ctjack]

Looks like condensation to me. So yeah, water/liquid was in there.
It reminds me of old Iphones(1,2,3), which died because of "water damage" as Apple said. But it was only the fact, that people come into warm place from cold in the winter.
That is why if my laptop hangs in a backpack in the winter for more than 30 minutes, then i give it 1 hour time to sit in the backpack when i came home. If you take laptop right away from backpack into the warm room, it will condensate immediately. Just like glasses in the winter - they become foggy because of temp difference.

 

[firedept]

I can't verify for sure but from what I am seeing it looks like water got in at one point or another. One thing I use to do when I lived in Canada where you had extreme temps was to get water absorption packets and place them near my laptop to stop condensation from occurring. It worked really well. Just offering some advice.

 

[Audit13]

It does look like the area has been exposed to liquid. It's possible that there are additional areas on the other side of the board that may have signs of exposure.

 

[ondert]

Oh I see, because just bought this Air as 2nd hand and the previous owner told me that it got repaired because it wouldn't boot properly. He just said it would turn on maybe once in 10 attempts and the fan used to go full blast while the screen remained complete dark.
Probably this was the issue.
If so, does it affect the temps? I ran a few Cinebench R20 test in a row, it performed as expected but I see higher than expected idle temps. Around 55-60 Celcius degree. Probably it's doing some indexing at the background since I've just reformatted it.