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Modèle A1278 mi-2010 / processeur core 2 Duo à 2.4 ou 2.66 GHz

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Is this logic board fried post liquid spill?

My GF's sister spilled a smoothie down the back of her macbook, so I am attempting to diagnose the situation for her. It appears that some of the liquid made its way through the vents and pooled right under this spot on the logic board. It didn't short out immediately. She was able to turn it off on her own, but after letting it drain and dry, it wouldn't power on. The MagSafe also shows no lights when plugged in. There's no sign of damage anywhere other than this spot, but is this enough damage to fry the whole board?

Photo of damaged area:

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https://www.dropbox.com/sh/pj9slcwunjw1o...

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https://www.dropbox.com/sh/pj9slcwunjw1o...

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Any chance you can post another image of the complete logic board to determine the exact location of the damage? It will make it easier to identify. Also, for now, I would no longer try anything else with the computer/board. You are increasing the chance of further shorting out other components. Clean the complete board with sterile water and a soft brush, then rinse it thoroughly with 90%+ isopropyl alcohol.

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Added the photo of the full board. If you can't tell, it's at the bottom, right in the middle of the photo. I've avoided "fiddling" with it, aside from removing it and a quick 97% alcohol wiped down. I'm assuming that it's toast since it's not showing any signs of life, but I'm in no way an expert! Thanks for your help though!

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Scott McKinnon, okay, so that is around connector J5100 that is Apple's test connector for debugging the logic board. The real issue here would be the circuitry around U6100 which is your MX25L3205DM2I CMOS SERIAL FLASH (datasheet available right here) and all of this is part of your SPI ROM circuitry. Start of by checking the power fuse F6905 coming from your MagSafe DC power jack J6900 (right next to it), also check the DC in board for any damage and check the power on the connector. It is on the underside of the board. I suggest to clean the board and then re-evaluate. See what you get from that.

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This is very likely fried. Look for corrosion on the other side, but just a small amount of liquid can fry a logic board because if just one connection is rerouted by the liquid, it can go into certain inputs that can't handle that much power.

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Use a magnifier to look for corrosion (i think I see some in the photo) burned spots, swollen components. Cleaning may revive a corroded board, it is not a fix for damaged components. At this point since it's not working at all you have nothing to lose by pulling and cleaning and reassembling. Follow the tags at right for "repair liquid damage" to see how you can/should clean and dry the board (wait days not minutes or hours for it to dry).

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Scott McKinnon sera éternellement reconnaissant.
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