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After I disassembled the MacBook 12“ Retina 2017, it was no longer possible to turn it on (battery 100%).
It only worked on with the Apple 20W USB-C Power Adapter after some time.
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In your post you say it worked using a 20W USB-C power adaptor after some amount of time. The charger that is meant to be used with this system is the 30W model. You may get unusual behavior using a less-than-30W charger. You should also reset the SMC using the instructions found here. If you continue to have issues after resetting the SMC and using the correct charger, then you should check the condition of your battery using a tool like coconutBattery. Good luck!
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That's right. You normally use a 30 W charger.
----> I've disconnected the battery from the LogicBoard. My battery was fully charged before, but it wasn't possible to turn it on.
It is recommended that 2017 models also run on less power. So after various time intervals I tried original Apple chargers with 5W, 12W and 20W.
It works fine. No errors found.
Did u ever fixed ur MB?!
I'm confused—I'm not sure I understand you. Does the machine work fine with the battery disconnected, but fail to power on when the battery is connected? If that's the case, then you probably have a failed battery. Good luck!
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