What is this flex cable attached to the battery chipset?

Question

MacBook Pro 13インチ Touch Bar Late 2016

モデル番号A1706/EMC 3017ー2016年11月発売。この13インチのMac Book ProはOLED Touch Bar搭載です。デュアルコア"Skylake" Intel Core i5 CPUと4つのThunderbolt 3ポートが特徴です。

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Ulf @ulflun

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投稿日: 2018年4月8日

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What is this flex cable attached to the battery chipset?

Im trying to look over a water damaged MacBook Pro w/ Touch Bar. I accidentally snapped of a flex-cable that seems to be attached to the battery chipset.

iFixit's breakdown YouTube video of the Late 2016 Touch Bar shows a clear picture of it:

Anyone knows what it is and does? Is it needed for the laptop to start?

Just to troubleshoot, do I need it? (The battery is probably gone anyway).

Also, Does the MacBook Pro w/Touch Bar start without a battery? (USB-C charger connected).

I can see that one USB-C module is fried (right one). Left one seems OK. Does it start with one side unplugged? I can see the part as replacement in the ifixit store. Great if I get the machine running again. :)

Battery specification: 020-01705 / A1819

Anyone? Thank you in advance!

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Please post a couple of images one that shows the damage clearly (tight shot) and a second showing enough area so we can reference what you are talking about. iFixitでの質問に画像を追加する方法

Dan さんによる2018年4月8日

Dan: Thanks for you quick answer. I've now attached some more clear picture captured from iFixits breakdown video as well.

Ulf さんによる2018年4月8日

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Please post a couple of images one that shows the damage clearly (tight shot) and a second showing enough area so we can reference what you are talking about. iFixitでの質問に画像を追加する方法 — Dan
Dan: Thanks for you quick answer. I've now attached some more clear picture captured from iFixits breakdown video as well. — Ulf

Dan @danj 評価: 481.3千 Self employed contract worker 35 331 971 · Answer 1 · 2018-04-08T08:49:32-07:00

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Dan @danj

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投稿日: 2018年4月8日

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Ouch!! Sadly this is the SMC circuit connection to the logic board. Your battery won't charge without the connection. I'm not sure if the battery will even run your system as some of the SMC circuitry that was on the logic board is now on the battery in this series.

Time for a new battery in any case.

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Thanks for you answer.

$@$* happens, but I guess since the laptop was drowned in coffee and shorted I guess there is a big chance the battery is bad anyway.

Do you know if I need the battery in order to start the machine? (I don't have a charger yet so I can't try).

Ulf さんによる2018年4月8日

Give it a try ;-}

I'm sure it won't work without the power adapter.

Dan さんによる2018年4月8日