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I have a 2016 that has no known damage, just one day would not boot up out of the blue. It turns on, fans spin up, caps light comes on, but no chime, no video on screen or through USB; touch bar does not light up. It shows about 19-20v on USB and will make the noise when connecting power.
I have tried all the resets and disconnecting the battery overnight, no help there.
An ideas what to check next?
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Sadly, this maybe a lost cause. I don’t say that too often as this series had a fair amount of issues.
Between the butterfly keyboard and the power regulator circuit burning out and now given the age of the system likely needing a fresh battery the cost of getting back into shape maybe more expensive than finding a newer system (2018 or newer) used.
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What is your goal here?
To salvage your stuff off of the drive or to get a working system?
par Dan