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Repair information and guides for the 2015 Retina MacBook Air. Model A1534

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A1534 No Power, But 14.5v At Fuse

Hey guys! So I recently picked up a a1534 for cheap. Previous owner said she spilled water on it a while back, let it dry out and it worked. After a few days the computer would only work plugged into a charger, so she attempted a battery replacement. She said after the attempted battery replacement, it wouldn't boot back on. So I opened it up and the first thing I noticed was bent pins on the type C connector to the logic board. I I unbent those assuming it would be smooth sailing from there, and that I probably fixed the problem. Wrong. I tested the fuse beside the DC in portion of the logic board and I'm measuring 14.5v and the LED beside the battery also lights up, however the machine is not powering on. Supposedly that fuse should be getting 20v, but I'm only getting 14.5? Anything I should check for specifically?

EDIT: I decided to pop off the CPU “heatsink” and the CPU gets warm! I'm so stumped on what to do.

EDIT#2: I downloaded board view + schematics and It seems like im getting no voltage on PP5V_S0 , could that explain my issue? 14.5ish + my missing 5V rail would get me to 20ish? Does that make any sense? I downloaded a board view software and i'm exploring around.


EDIT #3: I’m getting a similar problem here: https://www.youtube.com/watch?v=F-sTAO9B... . Depending when I measure, I’m able to catch fluctuating voltage, sometimes its a steady 5v, then drops to almost nothing. Unfortunately I have no way to inject current and find out where it’s shorting..

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I would find my way over to Louis Rossmann’s YouTube’s A1534 Retina MacBook

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19 comentários:

I seen A LOT of his videos, and unfortunately for me, the common issue is the fuse only measures 5v, but I'm getting 14.5 indicating my problem is different than the one that plauges most macbooks

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@Corbin Titus - Time to get the schematics and boardview's so you can trace out the logic.

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@danj sadly I'm not THAT advanced.. I have a harbor freight multimeter and an Amazon hot air station.. good news is I think I can feel the CPU get hot, but it's not booting up? I just need a good place to start.. specific places my multimeter can measure without fat fingering done and shorting everything out..

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There is a point when you have to let go. You really need the schematics to get any deeper. The boardview drawings will get you to the area in question. There really is no other way to diagnose a logic board issue like this. Your only other options is just replacing it Retina MacBook 2015 Logic Board Replacement

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@danj It seems like im getting no voltage on PP5V_S0 , could that explain my issue? 14.5ish + my missing 5V rail would get me to 20ish? Does that make any sense? I downloaded a board view software and i'm exploring around.

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