Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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MBP won't turn on, DC Board or Battery?

I have a water damaged laptop that I took apart dried out and had working until the battery ran out. Now it won't power on. The MagSafe light is a steady bright green, the 1st battery indicator light flashes green. When I unplug the battery, all 5 lights flash green. I'm assuming that since it ran fine until my battery went dead that I need to replace the DC Board but getting the green light on the MagSafe adapter confuses me. How can I figure out what to replace?

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It's not clear... have you tried a new/different battery?

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That you have a green light on the magsafe only indicates it is supplying power, and, it's grounded. If there's a bad ground you won't get a green light.

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