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Ursprünglicher Beitrag von: Colton ,

Text:

In my experience on newer Macs, they still run when the battery is gone and plugged into power, so I don't think it is your battery necessarily. The lack of a chime is concerning to me. It could be that the volume is down, but it could also mean that it is failing the POST.

Have you tried an SMC reset and an NVRAM reset? Technically disconnecting the battery and power will reset the NVRAM, but worth a shot right?

To reset SMC hold down Shift + Control + Option and hit the power button, while plugged in. You should see the charger LED change from Red to Green and back or Green to Red and back, depending on if it is fully charged or not.

If that doesn't work, hit the power button and immediately hold down CMD + Option + P + R and wait until you hear the chime. If you don't hear it after a while, it didn't work.

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