4mem/61/40000000: 0xbac41d18

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FHuge Author

Level 1

4 points

4mem/61/40000000: 0xbac41d18

I got below code as the result of een AHT diagnostics testrun on a iMac 27" mid2010:

4MEM/61/40000000: 0xbac41d18

What is this error and can I fix it myself?

Thanks!

iMac 27″, macOS 10.13

Posted on Nov 2, 2021 3:59 AM

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Answer 1

den.thed

Level 10

90,742 points

Nov 2, 2021 4:48 AM in response to FHuge

Run the test with one RAM module installed and then the other.

see > https://support.apple.com/en-us/HT201191

Once you have isolated the bad module.

Replace it, or better yet, replace both with a new pair of compatible RAM modules.

see > https://eshop.macsales.com/shop/memory/iMac/2010/DDR3_21.5_27

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Answer 2

FHuge Author

Level 1

4 points

Nov 3, 2021 5:22 AM in response to den.thed

Testing took some hours.. One of four modules triggers the error, I removed that one for now and test of the last three gives no problem anymore. Still 12 GB left, will do for now :-)

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Answer 3

den.thed

Level 10

90,742 points

Nov 3, 2021 5:29 AM in response to FHuge

Good work.

Is it one of the original modules or one of the aftermarket modules?

Also note that some suppliers OWC, Crucial and others, have a lifetime guaranty. and will replace the module.

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Answer 4

FHuge Author

Level 1

4 points

Nov 2, 2021 4:51 AM in response to den.thed

Hi Den,

Thanks, I will do that.

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Answer 5

den.thed

Level 10

90,742 points

Nov 2, 2021 4:58 AM in response to FHuge

You're welcome. Let us know what you find.

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4mem/61/40000000: 0xbac41d18

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