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Lanciato a novembre 2020, il MacBook Pro da 13" ha il SoC basato su ARM M1 di Apple con una CPU octacore e una GPU octacore. (Modello A2338 / EMC 3578 con due porte Thunderbolt 3)

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Battery not detected - cable snapped in half

Hi all. Bought a new battery for a MacBook Pro that I got as faulty - it works great without the battery. Thought a new battery will get it back to normal, but seems like I found why it is not detected - this cable is seemingly snapped.

There is no continuity between plus pin and any other parts on the motherboard. And it feels really loose - absolutely not the way it should be.

Also there is no 12V on the pins when laptop is on but there used to be.

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Seems like it is possible to replace it with hot air - is that so?

What is the name of that part? Can it be purchased?

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UPDATE:

So of course I soldered a replacement nicely and it works, but MacBook still won’t detect battery data. It won’t start on the battery, but if I start it with power plugged in and then remove it - it keeps on working from the battery.

However it won’t show any battery data or charge level.

Also I noticed that this chip on the flex cable is getting hot to around 50º C when Mac works. Checked nearby caps - no short. Maybe normal, but who knows.

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Any idea what it does?

One more thing: trackpad is disconnected can this fact somehow influence battery operation?

And in general any good ideas are greatly appreciated 🙌🏻.

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There shouldn’t be any heat that implies there is a short some where.

da

I checked on those caps - 5V and no short

da

And as for Coconut Battery - it also doesn’t detect any battery at all

da

@insympathy - Then I suspect the MacBook Pro 13" Retina (A1708, A2159, A2338) Battery Daughter Board Cable is either not matting fully or is bad.

da

@danj yeah, thanks, gonna buy a new one and see. Seems like either it’s the cable or some mysterious relation to trackpad not being plugged in. We'll see.

da

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Ouch! Not good 😡

Sadly this is not offered as a spare part. The only solution which I had to do is salvage the part from a junker board. Over bending the clip is the issue, Apple did a terrible design here.

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True, because surely no one has been fooling around with it for any significant amount of time. It was only disconnected a couple of times reeeeeally gently. By me. It was also at some local repair shop - maybe that’s a whole different story, but anyways I’ll have to try to salvage it somewhere. Maybe I’ll try to solder a wire from a connector to the nearby pin where we have 12V with a plugged in power and see if that will work. Then it’ll make sense to replace this connector. If not - maybe I’ll just sell it for parts.

da

@insympathy - These are main power lines which is high current, the gage of the wire needed is quite large.


Just be careful as a short can both create sparks as well as cause the battery to run wild overheating quite quickly if it’s a full short or not.

da

I found this part for purchase, so I'll just replace it

da

@insympathy - Where did you find it I could use a few to fix a few systems.

da

@danj found it here in Kyiv, but try eBay - found it in the US there as well for like 13$ each.

da

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It can be found as 821-00583-A

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in_sympathy sarà eternamente grato.
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