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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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Battery not detected - but work with Guest user

My MacPro was operating perfectly yesterday, but suddenly today, it show No battery available as the image

Block Image

I tried to reset SMC, reset NVRAM several times but it still doesn't work. Whenever I unplug the connector, it will shutdown slowly, then if I press the power button, screen will show the red icon that run out of battery.

Edit1: At login screen, I see the battery icon is normal (90%) for 5 or 10 seconds, then it show an "X" icon again

Edit 2: When I login as Guest user, unplug, it shutdown, but I can turn it on again by pressing power button, without charging.

So what could I do in this situation?

Thank you.

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Battery is getting power (hence why it works with charger unplugged) but the data line for power has an issue, so it thinks there is no battery disconnected. If you unplug the charger, usually the screen will fade out instead of turning off straight away (when the battery is actually disconnected) and on older models, the fan will still spin for a bit when the charger is unplugged, when it has a data line issue with the battery.

This will be a logic board related issue in most cases, sometimes it is battery related on the newer models; check for liquid damage and clean where necessary with 95%+ isopropyl. If you have experience and tools for microsoldering, I can further guide you on points to measure with a multimeter; otherwise, best to send it to a repair centre who specialises in logic board repairs.

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Unfortunately I don’t have experience for micro soldering, so maybe I will send it to get repair. Just want to confirm that it’s not battery issue. Thanks for your reply.

by

It most likely is not related to the battery unless a component on the battery PCB for the data line is damaged, so it is most likely the logic board. Only sure way of knowing for sure is to try a test one

by

Hi again, I bring my mac to 2 centers to have it fixed, but they all say they don't ensure they can fix it successfully (!?) So I just want to ask, if the problem is the logic board, is it difficult to fix it?

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If it is a problem with the logic board it is most likely the SMC; you need to remove this from a model of the same screen size and year (it has programming on it), reball it, then solder it on the logic board it is meant for. This is time consuming, since sometimes the SMC you reball is bad, and due to this some repair centres only replace the SMC on MacBooks they own, not as a customer service (since SMCs are a limited resource and they are no better off if it doesn't resolve the issue)

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Thank Reece, it seems complicated than I thought

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