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The April 2014 update of Apple's 13" MacBook Air features refreshed dual-core i5 and i7 processors, plus slightly increased battery performance.

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No green light after disassembling liquid damaged MacBook Air

I have a liquid damaged Macbook Air and bought a Nice wire Magsafe 2 45W charger which gave me a green light. After the disassembly, I have no green light. I have not damaged anything during this. Is it possible that this has happened because it is not a genuine charger? Apple do make ways of finding if the charger is not genuine to reject any input so that you can buy there chargers for extra cash.

I do feel that it might be the charger as I have no diode readings no that there is no green light. The adapter sense/one wire circuit is used as a way to reject non genuine chargers but I want confirmation and other possibilities.

8.1V on PPBUS_G3H and other 8.6V Power rails? Liquid damage.

I have a liquid damaged Macbook Air. Readings are 8.12V on 8.6V power lines and 3.38V on PP3V42_G3H yet no green light.

PP5V_S5 is not present. S5_PWR_EN has no voltage and so, SMC_PM_G2_EN has no signal to. Is this a bad SMC? It has the 3.38V from PP3V42_G3H. Thanks.

Thanks.

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where did you buy the charger from? Where was the liquid damage located?

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@hootonberg It was from Amazon. I have even used a genuine and still the same. Damage around SMC, some near TPS51980. S5_PWR_EN has no voltage and SMC_PM_G2_EN has no voltage. SMC receives 3.38V from PP3V42_G3H. All 8.6V always on power rails are 8.12V. Is it an issue with the SMC as it is not outputting SMC_PM_G2_EN?

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What is the impact of this? It was a Nice wire charger with a good Amazon rating. What is the damage? Could it not be that the flex cable may be damaged?

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Amazon and eBay don't sell REAL units! These are knockoffs!

Review the Blue links below. The way these work damages the charging logic. Between damaging the DC-In Board, MOSFET's, sense logic and the SMC chip. I've seen it all and then some!

No such thing as a Nice charger! The ratings are bogus!

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@danj So what should I repair, how would I know what is causing 8.1V?

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Sounds like you got a knockoff charger which tend to damage the logic board! While more expensive there is a big difference in the quality of the charger. Get a REAL MagSafe charger your system requires! Apple 45W MagSafe 2 Power Adapter for MacBook Air

● Don't Replace Your MacBook Charger With a Cheap Knockoff

● OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth

● Lacking safety features, cheap MacBook chargers create big sparks

● FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger

Now you will need to fix your logic board from the knockoff chargers damage.

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