Apple Hardware Test Error Code 4MEM/66/40000000: 0x82813298

Question

Level 1

12 points

Apple Hardware Test Error Code 4MEM/66/40000000: 0x82813298

Hi,

I have a Macbook Pro 15" late 2011, with 16GB DDR3 RAM, and last night while visiting a website my computer just restart. The screen become grey with a lot of horizontal lines, and when the apple logo disappear, the screen just become grey.

I restart the computer again pressing the "D" boot key for diagnostics, and the computer just initialize normally. So I started to watch a movie and suddenly the computer shutdown.

Today, at the morning I opened the backdoor and see that near the fan a screw was loose. So I tight it, pulloff the two memories to clean, put it back again, close the door and the computer initialize normally again. So to test it I opened a lot of videos at the same time, and the machine still working without shutdown or restart. After that I resolve to make a hardware test with the boot keys option+D. I did an extended test and after 1 hour and a half it returns me the following alert error code 4MEM/66/40000000: 0x82813298.

I try to search in the web and found that is something related with the memory, but could not find what it is exactly. It could be because I'm running 16GB of memory in a machine that just support 8GB of RAM? Or is something about my hardware?

MacBook Pro, iOS 10.2.1

Posted on Mar 21, 2017 10:02 AM

Reply

Answer 1

chicow Author

Level 1

12 points

Mar 21, 2017 7:11 PM in response to Kappy

Thanks for your answer. Could be something like that but I'm not sure. If one of them are bad the problem should remain, don't you think? Until now the machine still working. I thinking in open the backdoor again, take out the modules, clean them and make another test.

Reply

Answer 2

Mar 22, 2017 8:14 AM in response to chicow

If one of them are bad the problem should remain, don't you think?

It would be nice if memory modules, once bad, would keel over and stop working. Alas, that is NOT the case. Weak memories may fail tests sometimes, and pass at other times. They may lurk in system software and change suddenly, causing loss of data or crashes. It can sometimes take weeks of overnight testing to finally identify a bad module.

You have the benefit of knowing that at least one of your memory modules has failed a memory test. Knowing that, you should replace them both as soon as possible. If you do not, you face loss of data integrity or loss of use of your computer, or the worst fate of all: A computer that is unreliable/flaky -- works sometimes, and not others, without any reason.

Reply

Answer 3

Mar 21, 2017 10:04 AM in response to chicow

Hey chicow,

Apple Diagnostics: Reference codes - Apple Support

Reply

Answer 4

Kappy

Level 10

362,007 points

Mar 21, 2017 7:06 PM in response to chicow

The test has found a bad memory module. I suggest replacing the two old modules with two new ones. For good prices and products see OWC, DataMem, or Crucial.

Reply

Answer 5

Kappy

Level 10

362,007 points

Mar 21, 2017 10:13 AM in response to Diego_Cardiff

I suggest you read the document. There is no reference to the reported error.

Reply

Answer 6

Mar 21, 2017 1:11 PM in response to Diego_Cardiff

The document you cited is for Apple Diagnostics, which generates different codes from the Original Poster's use of Apple Hardware Test, a different test suite.

Reply

Answer 7

Kappy

Level 10

362,007 points

Mar 21, 2017 7:19 PM in response to Grant Bennet-Alder

I think he means well, but doesn't know that much.

Reply