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The March 2015 update of Apple's 13" MacBook Pro Retina Display, model A1502, features fifth-generation Intel Core i5 and i7 processors and introduces the Force Touch trackpad.

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Why is the PP18V5_DCIN not present on the board?

Hi,


I’m trying to understand what is going on with my Macbook Pro early 2015 (820-4924). I don’t have any power the PP18V5_DCIN is not present on the board. I have something around 600mV with a pulse of 4V that I can see with a scope, but nothing else.


Which also mean I don’t have any rails present to, am I right? I checked voltage at the connector of the MagSafe 2, so it is not a problem with the fuse. There is no short to ground, I have the 68k between ground and PP18V5_DCIN.


Did anyone know what could be the problem?

Beantwoord! Bekijk het antwoord Dit probleem heb ik ook

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The 600mV looked a lot like a diode. So I investigated a little deeper in the circuit. I found out that Q7130 has burn. The mosfet burn acted like a diode, (from the side diode). Once removed from the circuit the 18.4V came back.

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david_dozois zal eeuwig dankbaar zijn.
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