Not powering on. Tried known good AC adapter. Light on the adapter.
I replaced the DC jack but still not powering on.
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Aside from corrosion (check both sides) you must look for burn marks and swollen components. Use a magnifier. You could try using the jumpers to boot if you have a known good, charged, battery. You could try putting the battery in MacBook Unibody Model A1278
2 GHz (A1278) or 2.4 GHz (A1278) - uses the same battery.
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