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Released in May 2020, the 13" MacBook Pro features quad-core Intel 8th generation Core i5 and i7 processors, and Intel Iris Plus 645 integrated graphics. (Model A2289/EMC3456 with two Thunderbolt 3 ports)

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Powering Down when unplugged

Our 2020 13” MacBook Pro will power off immediately after charging cable is removed, even with 100% charge, and will not power back on using the power button.

Battery is newly replaced and showing "Normal" in system settings. I have tried resetting SMC and PRAM/VRAM. The only way to get it to power on after powering down from removing the power cord is to reset the SMC it seems.

Has anyone experienced this before and found a solution? Any help appreciated.

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Hopefully I selected the correct version of your system this is the two port version vs the four port.

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I have this issue before on 2 MacBooks (Air & Pro 2017 - 2012) They had the same issues when unconnected, lights out.... The issues I had were the power from the battery was not being relayed to the board some shorted components. it needed board level fixing by an experienced tech guy. This also strangely happened after installing a brand new battery on them... Now I always make sure the board is drained of all power by pressing the power for 30 seconds, and then a few times more just for good measure before I touch anything inside.

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Let’s give this a try, restart your system while the charger is plugged in, then when you press the power button you want to press the D key to enter into the Onboard Diagnostics let’s see if you get any errors.

Then if that doesn’t tell you anything install this gem of an App CoconutBattery. what we want is to run the battery down a bit after you’ve managed to get the system to run off the battery.

Please let us know the error message and also post a snapshot of coconut battery while the battery needs charging.

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