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The March 2015 update of Apple's 13" MacBook Air features fifth generation Intel Core i5 and i7 processors, resulting in slightly increased performance and battery life.

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I/O board or logic board problem

Hello.

I recently bought 13” MacBook Air early 2015 which was listed as non-working.

I first plugged in the charger and it was sometimes charging and sometimes not. So I opened it and inspected the logic board, but everything seem just fine, no corrosion no burn marks nothing.

After I inspected the I/O board I saw that it look a little bit odd. Some pins were purple and green instead of gold and some plastic parts did look burnt. But no corrosion again.

After I plugged it back in again, with just the I/O board, logic board and fan this time, the light on the charger said it is charging (it wasn’t always working) and I checked the voltages on some parts on the board and there were none to very very little which was odd to me because in videos on youtube its always either working or on 0V.

I then unplugged the I/O board and checked the voltages on ?? 6 pin ?? conector from I/O board to logic board. First two pins got 3.4V the third got 0.2V and the other three got 0V. I’m not sure if that is right or not but it seems odd to me and I don’t know if i need to replace only the I/O board and if the logic board is still OK?

Can anyone please answer? Can I check the logic board other way without I/O board to determine if its still OK?

Also sorry for my bad knowledge and language, I’m 17 years old and I don’t know a lot about these things but I’m looking forward to learn something :D

Thank you very much

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Arrow points on a thing that look a little bit odd to me. It look a little bit burned. At least the plastic on top of it looks like it was melted a little bit.

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Voltages on pins is from left to right

1 = 3.3V 2 = 3.3V 3 = 0.001V the rest are zero

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i dont know if the picture shows it but the little gold pins are not shiny gold. When i first opened it they were green and purple like burnt metal. I cleaned them but no difference

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Can you post a few pictures so we can see the areas of the I/O board that look bad Adding images to an existing question

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If you need more pictures and voltages on components i can take them and post them. Also thank you for helping

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Hi @ritsetivid

What is the model number of your motherboard? (820-????)

I'll have a look what voltages you should be getting.

door

It is 820-00165. Thank you very much :)

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Give this a try: Disconnect the mag-safe charger, unplug the battery from the logic board, press and hold the power button for ten seconds. Reconnect the battery, attach the mag-safe. It should spontaneously reboot at this point.

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I tried and no luck :/

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ritsetivid zal eeuwig dankbaar zijn.
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