Apple Hardware Test error 4MEM/9/40... not fixed by replacing memory modules

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Apple Hardware Test error 4MEM/9/40... not fixed by replacing memory modules

iMac (27-inch late 2012), 3.4GHz, 32Gb RAM, macOS Sierra 10.12.6

iMac was shutting down unexpectedly and ungracefully. To restart, had to disconnect iMac from mains power for a few seconds then plug back in. Sometimes had to leave disconnected over night. Could no longer upgrade OS because iMac would always crash. (Thank god for Time Machine backup!)

So I ran Apple Hardware Test and got an error 4MEM/9/40000000: 0x80822d90. Searched the Internet and most forums say that this error means a faulty memory module.

So I replaced the memory, all 4 modules.

Then ran the Apple Hardware Test again, but still the same error: 4MEM/9/40000000. Has anyone had this experience and if so what did you do you to fix?

Many thanks for any advice.

Posted on Apr 18, 2018 4:07 AM

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Answer 1

MoonJ.

Community Specialist

Apr 18, 2018 4:30 PM in response to deantmenzel

Hello deantmenzel,

Thank you for using Apple Support Communities. It's my understanding that you've been experiencing issues with your Mac unexpectedly shutting down. You're reaching an error when running an Apple Hardware Test and replacing the memory didn't help. You've done a great job trying to get this resolved! At this point I recommend contacting Apple Support for further assistance with this issue.

Contact Apple Support

Have a great day!

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Apple Hardware Test error 4MEM/9/40... not fixed by replacing memory modules

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