Chosen Solution
i had spilled water on my mid 2015 MacBook pro a1398 with dual graphics. I Swapped the motherboard with a new one-it was a 2.5ghz one, this time with a 2.8. it bootlooped at first, then would chime with no display or external display. i replaced it with another new board and had the same issue. i took it apart and made sure everything was connected etc. suggestions? i don’t think it could be because the new board has a different processor, they were all made and used at the same time. thanks—
You likely have more damage than the logic board. Where did the water go and what was in the water?
