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A1502 green light no power. Had liquid damage on keyboard connector contacts 10-15 cleaned it renewed the contacts. i noticed while measuring PPBUS_G3H and L7130 Beeps
So you have short on pad1/l7560, not on pad2.
What is the exact value, ohm scale?
You can try injecting voltage; let see if something heats up.
Start with 1V and go up, no more than 5.5V, maintaining bellow ampers limit of power supply.