Brand new iMac shuts down unexpectedly, doesn't want to power on, and wait there's more!

Purchased in April an iMac, 24 inch M1.

About a month later it started randomly shutting down. 

Was difficult to restart.


July 2 opened case with Apple support.


Told me to reinstall Mac OS.

Tried several times, but would not reinstall.

Finally it shut down and reopened in safe mode.(Without my help)

Then I was able to reinstall the system.


Downloaded Clean My Mac to check for malware.

Changed power plug strip.

Checked everything I could.


Started shutting down by itself again. Very difficult to restart.

Have to press the on button 10 to 30 times to get it to start up.

Also sometimes when it starts up it has to be restarted again to get it to function as the status strip is missing on restart.

Also sometimes when you actually shut it down it starts right back up by itself.


Opened case with Apple and was told to take to Apple Store.


Took it to the Apple Store and they replaced the Logic Board and also the Ambient Light Sensor and Microphone cable.


Had it back home for about 3 weeks, it shut down twice since then but was not a problem until now.


Sept. 14 it was shut down when I got up, would not start up for about 10 minutes, tried about 80 times. Finally came back on and the status bar was missing. I restarted it, and then it shut itself down again twice, finally the 4th time it restarted with the “Your Mac shut down because of an issue” prompt. Sometimes when it restarts itself it will flash bright pink.


Sept 15, shut itself down during the night, came back after pushing on about 30 times, worked immediately.


Also Sept 15 shut down during the day, restarted 4 times until status bar came up when it was an instant restart by itself.


Sept 15 I shut it down for the night and it restarted instead and said it had shut down because of a problem even though I had shut it down.


Sept 16, wasn’t on in the morning, took about 10 minutes and three or four restarts to come back on with status bar. Same thing happened in the afternoon. When I try to restart it shuts down instead.


This rarely happens when I am using the computer, only when it is not in use.


[Edited by Moderator]

Posted on Sep 16, 2023 12:19 PM

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Brand new iMac shuts down unexpectedly, doesn't want to power on, and wait there's more!

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