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Got this board, no liquid damage. The problem is that sometimes it is not detecting magsafe ( no light on it). Already checked ISL65... and 17/18, 27/28 are ok. Reballed SMC and still have that issue.
Did you try another DCIN board and charger?
Clean their contacts first.
Inspect U7000/1 for corrosion.
Check continuity from U7000 to Magsafe central pin.