Auto boot and shut off loop from apple logo with charger

Question

MacBook Pro 15" 配备 Retina 显示屏 2015 年中版

2.2 GHz (Turbo Boost 最高可达 3.4GHz), 2.5 GHz (Turbo Boost 最高可达 3.7GHz), 或者 2.8 GHz (Turbo Boost 最高可达 4.0GHz) 四核 Intel Core i7 处理器，配备 6MB 共享三级缓存。

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Sayan Ghosh @theguitarfreak

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发帖于: 2020年10月30日

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Auto boot and shut off loop from apple logo with charger

My device won't start without charger. With a charger connected, it auto boots and shuts off with the Apple logo and loading bar upto 30%. This continues in a loop. Diagnostics with D say battery not detected. I had a burning smell come out of the DC port last when it worked fine and the charging port used to get extremely hot. I have bought a new charger and tried.

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If you can boot up in Safe Mode (Shift ⇧ key) let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see 在已经存在的问题里加入图片

Reference: Mac startup key combinations

由 Dan 完成的 2020年10月31日

Cannot boot to safe mode either. I guess i will have to replace the DC-in port and the battery.

由 Sayan Ghosh 完成的 2020年10月31日

Changed the battery and DC port. Auto bootup has stopped. Machine boots up fine to my desktop and everything works fine with charger. But no battery status is shown inside OS. On running Diagnostics, it says No battery detected. I am guessing the new battery needs to be charged fully to green before its detected by OS?

由 Sayan Ghosh 完成的 2020年11月9日

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If you can boot up in Safe Mode (Shift ⇧ key) let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see 在已经存在的问题里加入图片

Reference: Mac startup key combinations — Dan
Cannot boot to safe mode either. I guess i will have to replace the DC-in port and the battery. — Sayan Ghosh
Changed the battery and DC port. Auto bootup has stopped. Machine boots up fine to my desktop and everything works fine with charger. But no battery status is shown inside OS. On running Diagnostics, it says No battery detected. I am guessing the new battery needs to be charged fully to green before its detected by OS? — Sayan Ghosh

Dan @danj 声誉积分: 479.7千 Self employed contract worker 35 329 971 · Answer 1 · 2020-10-31T05:16:15-07:00

Dan @danj

声誉积分: 479.7千

Self employed contract worker

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发帖于: 2020年10月31日

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Sounds like you needed to replace the MacBook Pro 15" Retina (Late 2013-Mid 2015) MagSafe 2 DC-In Board as it likely melted enough to distort the plastic insulator plate. Its a bit of work as you’ll need to lift the logic board out following this guide MacBook Pro 15‘’Retina显示器2015年中期主板交换. Follow it down to step 39.

You may need a new battery as well! MacBook Pro（15英寸，带有Retina显示屏，2015年中旬）电池更换