AHT Error codes

Hi-
Does anyone know where to get Article number 113867 which explains the Apple Hardware Test (AHT) Error Codes for AHT v1.2.6 for Power Mac G4 computers? Trying to troubleshoot a problem child, and it would be most helpful to have that info!
The link to the error codes on the AHT v1.2.6 Article number 113868 results in "Document not found".
A search of the Apple Kbase for Article number 113867 results in only the article number 113868.
Kind of an "Escher-esk" loop of failure.....

Hi Tom-
"Type? error -65536" is the one error I have gotten before the AHT freezes, and that was prior to initiating the test.
Beyond that, the test will run through the logic board, issue a "passed" message, and freeze at mass storage- this is with or without hard drives connected. ATA controller problem???
I guess I am looking for more than the basic explanation of AHT that Apple provides in the kbase. I would really like to know the sequencing of the tests, so that maybe I can narrow the hardware problem down at the point the test freezes.
As it is, the G4 GE 2x450mhz is responding randomly to Disk Repair, PRAM reset, Archive and Install, Erase and Install, substitute CPU, and PMU reset. All have returned the system to bootable service, at least once, but always end with the system freeze, and subsequent failure of the system to load.
Stripped to the shipped configuration, with or without known/tested good CPU, HDD, RAM, Gcard, Keyboard & Mouse substitutes, the system either freezes at gray Apple screen, or, freezes shortly after loading the OS. Occasionally, the desktop is reached, but invariably freezes within moments.
Currently, after an open firmware "reset-all", the system refuses to move beyond the gray Apple screen.
The only thing that does work (most of the time), is booting (with much effort) to the OS X install disc (10.4.3), and running whatever utility or installer I choose. The origional system/software restore CD's (OS 9) result in a blank gray screen.......
So, even with the AHT error codes, I think the problem won't be ID'd with them. Would be nice to have the article Apple references, though!
Chris

Similar Messages

Mac Mini AHT error code: 2MLB/10/4: $0004.89f1

Have Mac Mini G4 1.42 purchased in 2005, upgraded by Apple service center to 1 Gb and never used - sat in box. I recently starting using it after putting and experienced random kernel panics and application crashes. Ran AHT which produced error code on second pass: 2MLB/10/4: $0004.89f1 .
Thinking this was RAM, replaced RAM with quality 1 Gb stick, ran AHT again, but on third pass received same error code, 2MLB/10/4: $0004.89f1 .
I am interested in knowing EXACTLY what this error code means - cannot believe this is not online anywhere. Can anyone with an error code listing tell me? I already suspect this machine will become a paperweight.
If so please post and/or email scotsilv AT aol.com
Thanks
Scot

...I noted that my machine's Boot ROM Version is: 4.8.9f1
So, $0004.89f1 is simply the boot rom version and 10/4 the OS.
Appears I had a loose Airport card, which when tightened seems to have made the machine stable.

AHT error code 4SNS/1/40000001:TB1T-0.00?

Running the long AHT on a Late 2008 (Unibody) MacBook Pro produced error code 4SNS/1/40000001:TB1T-0.00. I gather this is a logic board issue of some kind; does anyone know more about it?

Thanks; do you know what kind of "sensor"? I put the bottom plate back on, zapped the PRAM, and ran the short AHT, which passed. The fans came on, but went back down in a few minutes, so it seems like heat sensors might be okay. I'm going to run some maintenance routines and see what happens.
(A puppy peed on this MBP, and the owner brought it to me because it wouldn't start at all. I opened it up, found some ugly blue-green gunk, cleaned it, reset the SMC, and it started okay. Now I'm trying to figure out how serious the error reported by AHT is.)

What does AHT error code 4SNS/1/40000000:TB1T-128.000 mean?

My MacBook froze on me last night while running Firefox w/ 4 windows open, each with 6 or more tabs. Seemed partly due to using the instant message ap on Facebook. The machine forze with the beach ball spinning it's heart out. Shut it down, restarted, and got a freeze during start up. Tried again this morning and the machine seemed to run ok for a session, after which I closed the lid without shutting down. After opeing the lid, the machine ran ok, then slow, then froze. I eliminated peripheral problems, eliminated software problems, then ran an Apple Hardware Test.
It produced the code: 4SNS/1/40000000:TB1T-128.00
This code does not show up in Google or this forum. Any idea what it means or where I may find out what it means? It's a late 2008 MacBook, so no warranty whatsoever.
Thanks in advance for any help!
Kermit

I ran the hardware test on my MacBook unibody and got the same result. Did you ever get an answer as to what this code means? I haven't been able to Google it either.

AHT Error 4SNS/1/40000000:Te2S-128.000

Hi,
I just ran the Apple Hardware Test on my Mac Pro (desktop) 4,1 with OS Snow Leopard.. and I had an error code which I can't find anywhere online on what error is it referring to. Do anyone know what is this error? How do I fix it?
AHT Error code 4SNS/1/40000000:Te2S-128.000
What does it mean? And how can I fix the error?

Only Apple really knows. Sensor for some type.
What are you using to monitor thermal sensors and the rest of the system?
Download Temperature Montor
Schedule or take it in for a free checkup.
You can google to find the Apple Service Diagnostic CD.
Your Mac is 4 yrs old so likely out of AppleCare?
I could only find notebooks and they wree not that particular sensor code.

MacBook freezes / AHT gives Error Code

Hello everybody,
I searched the forums for the same error code but found none. In the last few weeks my MacBook froze in several different situations (while not in use, while closing and sending it to sleep, etc.) These cases were not hardware-hungry. Only Mail, Firefox and Adium where running.
The first time this happened I tried the AHT and it found following error:
4SNS/1/40000000:TG1H-81.500
I ran the AHT several times and everytime the code appeared except the last four digits. At the local ASP they did a PRAM reset and the error was gone. This week everything happened again – frozen system, same error code, etc. Even with a PRAM reset and an SMC reset the problem was not solved.
Does anyone have a clue? What shall I do?
Thanks in advance
Message was edited by: Mr_SelfDestruct

My Macbook is now out of waranty – but I phoned with the Apple Hotline before, because I had this problem in the warranty time and a ASP didn’t change hardware. They did a PRAM reset and everything was fine. I tried this and an SMC reset but with no success. So the Apple Hotline gave me some 30 extra days of warranty because the original problem was not fixed during the waranty time. Ok, and now the »problem« is, that suddenly the error code doesn’t appear in AHT anymore and I don’t know why. In a way I could be glad, that the error disappeared and that my hardware seems to be ok. But I thought that if the AHT finds an error, that definetly the hardware has a deffect. May the the error still be existent but at the moment unfindable for the AHT?
So how are the chances that the hardware will be repaired with no costs for me? How can I proof that this error occurs sporadical? Is there any known case where this happened?

Error message AHT 1.2.3: Error code disp/13/2 in video ram test section

Hello to the forum,
i have garbage on the screen on my Titanium DVI 867MHZ, so i run AHT in extended session and on video test section the first test with green-red stripes on screen runs but then the message Error code disp/13/2 appears. Does that mean the display has a problem or the video-ram is faulty or the grafic chip?
Greetings iMacG5-User

Unfortunately, AHT's very cryptic messages are intended to benefit Apple technicians, not ordinary civilians. That said, any message about a video or display problem is bad news, because it probably means replacing either the logic board or the display, and each is very expensive.

Got an error code after running AHT. Now what?

I ran the Apple Hardware Test and got the error code: 4sns/1/40000000:th1H-83.265
I looked it up and it apparently means there's a problem wuth my heat pipe or heat sink. Makes sense because my MBP burns up and fans really start going when running a game, movie, or photoshop. Does this mean I have to replace something or what? How much will it cost me if I take it in for repairs? I no longer have warranty. I had to replace my harddrive after it failed in Feb 2012 so I will not be happy if it turns out the failure was related to this heat problem and never fixed.
Mid-2009 13" MBP running OSX 10.8

That error is indeed a sensor failure. Make an appointment at an Apple store genius bar. It is a hardware failure that only they can resolve. They will tell you what costs are involved, I simply do not know that.
Ciao.

Same 4MEM/9/40000000 , but different aka (hopefully) the complete guide to this error code and changing RAM

Hello world,
finally, after having been reading here for years I decided to break silence and join the most venerable Apple discussions community!
First of all, I'm no native speaker, so if I at one point don't express myself correctly, I'm sorry. If you don't understand please ask what exactly I meant since it's very important that we know exactly what each one of us is talking about, thank you.
Important, too:
I know there are a lot of posts with this topic and I sifted through a lot of them but none of them captures exactly what my problem or rather my questions are and unfortunately in a lot of them there is no real feedback from the original poster how it all worked out or not. So, I intend this thread to be that one helpful thread which more or less concentrates the knowledge of the other threads, where people with similar problems can go to in future.
I ask one thing of you: Please DON'T answer with just one phrase à la "U got bad RAM, send it back" or "Contact Apple Customer Support Service whatever thingy" without explaining why this would be the only viable option (because I think it is not, at least at the moment).
All the questions I 'd like answered are green, for you to not lose track. I hope this becomes a good discussion so everyone of us can learn a lot!
Following problem:
Initial situation:
My Computer: MacBookPro 8.2, early 2011, 15", 2,2 GHz i7; Mavericks 10.9.5    (yet without this bash fix but ¯\_(ツ)_/¯ )
       - Upgraded RAM from onboard 4 (2 x 2) GB to the "unofficially" possible 16 (2 x 8) GB
Ordered RAM on Amazon.de with the right Specs: 204 pin DDR3 SO-DIMM (1333 MHz, PC3-10600S, CL9),
Manufacturer: CSX (http://www.csx-memory.com , while it's maybe not the most renown seller, it was described on another website as reliable )
    HERE (hope the link doesn't change):               http://www.amazon.de/gp/product/B0084SH6WA/ref=oh_aui_detailpage_o01_s00?ie=UTF8 &psc=1
       - Installed it, booted Mac without problem, what does System Profiler say? I have full 16 GB   1600 MHz   Memory installed
- Obviously sent me the "wrong" RAM (or can System Profiler be wrong??), funny thing: It works,
     --> after a LOT of research checked here http://guides.macrumors.com/Buying_RAM      my i7 is 2720QM, so supports it, lucky me
   Btw, if i go to About this Mac > more information > memory, the Text there even says it can hold 1600 MHz, has this been written there like this all along?!
- Which RAM do I have installed exactly now? since the sticker on it showed the originally ordered Specs.., moreover how do I determine the CAS latency of my installed RAM?
Crashes:
Didn't really have any, except..... well,
- In some instances Firefox (I think 32.02. or sth., the latest Version at this moment) reproduceably keeps crashing, for example right now, can't even start it, that's why I can't tell you the exact version, maybe I edit that later. Safari so far hasn't crashed.
- Once I had a System Crash, but it happened when I wanted to reboot after updating the firmware of a hooked on external WD drive to be usable again as time machine backup volume under mavericks (without endangering my data).
The RAM seems to work fine; for example when I was doing a long overdue backup of 77GB on said drive, Activity Monitor showed a RAM Usage of 15,99 GB and nothing crashed. Only the fans were powering at some point but i thought that normal..
- Actually produced two more Crashes when trying to run Apple Hardware Test (AHT), the one on the second disc that originally came with my Computer (probably made for OS 10.6.x    x= 6 or sth., don't remember which version my MBP was shipped with), which leads to
Tests:
Memtest86
- I put Memtest86 v.5.01 on a USB Stick and bootet from that and let it test "the whole" RAM
(btw Do you know how you can put the bootable USB image of Memtest only to one (of a few) partition of my 32 GB USB Stick? The instructions (command line stuff) only let me put it on the whole Stick which makes it otherwise useless as a volume; ok here I'm not sure if I'm using the correct technical terms....)
- I let Memtest86 do 3 and a half passes with one pass consisting of 10 different tests, so it took over 8 hours!
--> RESULT:   0   (in words: zero) ERRORS,
--> That is why I think my RAM is ok, because I think (think NB, don't know) Memtest86 does good testing,or do you know      better?
AHT
- After that, out of curiosity, I tried to run AHT from the DVD with said results, then I ran AHT (also called Apple Diagnostics under Mavericks) from the Internet, this worked, but produced the famous 4MEM/9/40000000 Error Code,
first one for example was: 4MEM/9/40000000: 0x8477df98, the last part after the colon is variable, but stays the same in one instance, i.e. if you repeat the AHT directly. If you restart the Computer an rerun the test then it changes, e.g. some other it showed 0x84770a18
- I did the short and the extended version, it took ca. 2-3 and 16 min respectively till producing the Error Code (only 1 at a time)
- Did it 4 times or so; once in short/simple version it showed no error, the rest the 4MEM/9 s.
some example of a simple test, results taken out of the System Profiler Window (fehlgeschlagen= failed):
Apple Diagnostics:
The usual self test on start up is always passed (bestanden), see for example:
What other than bad RAM can 4MEM/9/40000000 mean? I hope there are a few tech and computer savvy people around this place who know what they are talking about and can give me a good answer, or at least help to narrow it down. Actually I also think, the RAM sticks are not loose, but before I screw open my MBP again I would like to explore the other possibilities.
Is it probable that this Error Code has got sth. to do with me installing a) 16 GB of b) 1600 MHz RAM, or maybe with CAS Latency (i don't know the actual CL of this RAM)? and if so, is it only because some Apple Programmer/Developer/Technician wrote some values in a list on the System Level, so it doesn't accept RAM it would normally work with?? If it works fine and is faster, why change it?
Final Words:
I repeat, apart from the Firefox crashes, my Mac seems to be working fine, at least I don't notice anything, (well, that disk utility and System Profiler (or whatever it's called nowadays) sometimes take time to start up is nothing special i think, is it?)
But now I'm scared that perhaps there could be a future danger for my computer I do not foresee...I hope you can at least exclude that.
So I'd rather spend my time starting a discussion here with people who don't have to abide by some corporate policy (right?) than having the hassle of repeatedly screwing my Mac open and shut and doing expensive calls with all the companies involved who won't tell me anything more in depth than "we have to send it there, do more tests and you get it back then".
I hope that this thread won't rot in the wastelands of unanswered posts and that maybe all the people who take part in it learn sth. and all the people seeking help in future will find it here.
Thanks for your patience!
Waiting for your greatly appreciated answers,
MuddyMic
PS: Why is there no category Hardware, Components, RAM or sth similar? Not sure if it fits in Ports and Interfaces so I put it under Using a MBP

Hello world,
finally, after having been reading here for years I decided to break silence and join the most venerable Apple discussions community!
First of all, I'm no native speaker, so if I at one point don't express myself correctly, I'm sorry. If you don't understand please ask what exactly I meant since it's very important that we know exactly what each one of us is talking about, thank you.
Important, too:
I know there are a lot of posts with this topic and I sifted through a lot of them but none of them captures exactly what my problem or rather my questions are and unfortunately in a lot of them there is no real feedback from the original poster how it all worked out or not. So, I intend this thread to be that one helpful thread which more or less concentrates the knowledge of the other threads, where people with similar problems can go to in future.
I ask one thing of you: Please DON'T answer with just one phrase à la "U got bad RAM, send it back" or "Contact Apple Customer Support Service whatever thingy" without explaining why this would be the only viable option (because I think it is not, at least at the moment).
All the questions I 'd like answered are green, for you to not lose track. I hope this becomes a good discussion so everyone of us can learn a lot!
Following problem:
Initial situation:
My Computer: MacBookPro 8.2, early 2011, 15", 2,2 GHz i7; Mavericks 10.9.5    (yet without this bash fix but ¯\_(ツ)_/¯ )
       - Upgraded RAM from onboard 4 (2 x 2) GB to the "unofficially" possible 16 (2 x 8) GB
Ordered RAM on Amazon.de with the right Specs: 204 pin DDR3 SO-DIMM (1333 MHz, PC3-10600S, CL9),
Manufacturer: CSX (http://www.csx-memory.com , while it's maybe not the most renown seller, it was described on another website as reliable )
    HERE (hope the link doesn't change):               http://www.amazon.de/gp/product/B0084SH6WA/ref=oh_aui_detailpage_o01_s00?ie=UTF8 &psc=1
       - Installed it, booted Mac without problem, what does System Profiler say? I have full 16 GB   1600 MHz   Memory installed
- Obviously sent me the "wrong" RAM (or can System Profiler be wrong??), funny thing: It works,
     --> after a LOT of research checked here http://guides.macrumors.com/Buying_RAM      my i7 is 2720QM, so supports it, lucky me
   Btw, if i go to About this Mac > more information > memory, the Text there even says it can hold 1600 MHz, has this been written there like this all along?!
- Which RAM do I have installed exactly now? since the sticker on it showed the originally ordered Specs.., moreover how do I determine the CAS latency of my installed RAM?
Crashes:
Didn't really have any, except..... well,
- In some instances Firefox (I think 32.02. or sth., the latest Version at this moment) reproduceably keeps crashing, for example right now, can't even start it, that's why I can't tell you the exact version, maybe I edit that later. Safari so far hasn't crashed.
- Once I had a System Crash, but it happened when I wanted to reboot after updating the firmware of a hooked on external WD drive to be usable again as time machine backup volume under mavericks (without endangering my data).
The RAM seems to work fine; for example when I was doing a long overdue backup of 77GB on said drive, Activity Monitor showed a RAM Usage of 15,99 GB and nothing crashed. Only the fans were powering at some point but i thought that normal..
- Actually produced two more Crashes when trying to run Apple Hardware Test (AHT), the one on the second disc that originally came with my Computer (probably made for OS 10.6.x    x= 6 or sth., don't remember which version my MBP was shipped with), which leads to
Tests:
Memtest86
- I put Memtest86 v.5.01 on a USB Stick and bootet from that and let it test "the whole" RAM
(btw Do you know how you can put the bootable USB image of Memtest only to one (of a few) partition of my 32 GB USB Stick? The instructions (command line stuff) only let me put it on the whole Stick which makes it otherwise useless as a volume; ok here I'm not sure if I'm using the correct technical terms....)
- I let Memtest86 do 3 and a half passes with one pass consisting of 10 different tests, so it took over 8 hours!
--> RESULT:   0   (in words: zero) ERRORS,
--> That is why I think my RAM is ok, because I think (think NB, don't know) Memtest86 does good testing,or do you know      better?
AHT
- After that, out of curiosity, I tried to run AHT from the DVD with said results, then I ran AHT (also called Apple Diagnostics under Mavericks) from the Internet, this worked, but produced the famous 4MEM/9/40000000 Error Code,
first one for example was: 4MEM/9/40000000: 0x8477df98, the last part after the colon is variable, but stays the same in one instance, i.e. if you repeat the AHT directly. If you restart the Computer an rerun the test then it changes, e.g. some other it showed 0x84770a18
- I did the short and the extended version, it took ca. 2-3 and 16 min respectively till producing the Error Code (only 1 at a time)
- Did it 4 times or so; once in short/simple version it showed no error, the rest the 4MEM/9 s.
some example of a simple test, results taken out of the System Profiler Window (fehlgeschlagen= failed):
Apple Diagnostics:
The usual self test on start up is always passed (bestanden), see for example:
What other than bad RAM can 4MEM/9/40000000 mean? I hope there are a few tech and computer savvy people around this place who know what they are talking about and can give me a good answer, or at least help to narrow it down. Actually I also think, the RAM sticks are not loose, but before I screw open my MBP again I would like to explore the other possibilities.
Is it probable that this Error Code has got sth. to do with me installing a) 16 GB of b) 1600 MHz RAM, or maybe with CAS Latency (i don't know the actual CL of this RAM)? and if so, is it only because some Apple Programmer/Developer/Technician wrote some values in a list on the System Level, so it doesn't accept RAM it would normally work with?? If it works fine and is faster, why change it?
Final Words:
I repeat, apart from the Firefox crashes, my Mac seems to be working fine, at least I don't notice anything, (well, that disk utility and System Profiler (or whatever it's called nowadays) sometimes take time to start up is nothing special i think, is it?)
But now I'm scared that perhaps there could be a future danger for my computer I do not foresee...I hope you can at least exclude that.
So I'd rather spend my time starting a discussion here with people who don't have to abide by some corporate policy (right?) than having the hassle of repeatedly screwing my Mac open and shut and doing expensive calls with all the companies involved who won't tell me anything more in depth than "we have to send it there, do more tests and you get it back then".
I hope that this thread won't rot in the wastelands of unanswered posts and that maybe all the people who take part in it learn sth. and all the people seeking help in future will find it here.
Thanks for your patience!
Waiting for your greatly appreciated answers,
MuddyMic
PS: Why is there no category Hardware, Components, RAM or sth similar? Not sure if it fits in Ports and Interfaces so I put it under Using a MBP

What do Apple Hardware Test Error Codes indicate?

I recently installed new 1GB memory modules in both slots. When running the Apple Hardware Test, I got the following error code:
post/0/2048 S0DIMM0/J20STANDARD
Does anybody knows what this means? Up in the Test Results Box, it said Memory passed.
Do I have a problem or not?

I've had little luck finding a compilation of those AHT codes and their meaning. In your case, "post" is probably "power-on self test," the routine that all Macs run at startup to check for problems.
2048 is the total RAM qty in MB.
J20STANDARD is the logical name of one of the RAM slots.
Run System Profiler and see what it shows for when you select "Memory" from the left-hand pane. On my 1Ghz 17" PowerBook, Profiler shows one slot as J20STANDARD and the other as J23REVERSED and it runs fine. Profiler will tell you if the modules are matched for speed and CAS latency.

***NEED HELP. ERROR CODE -1450***

iTunes wont save any of the songs i import!!! i have made a back up disk of the music library and when i restore all the songs a screen pops up with n error code-1450. what can i do to fix the problem???? i alreary downloaded the new version of iTunes and still no results!
Windows 2000

Tarasik,
The most helpful information in those posts is staring you in the face in the very first link: it's quite possible—even probable—that you are running the wrong version of AHT (Apple Hardware Test).
Are you 100% certain you're using the version of AHT that came with your particular machine? AHT is highly machine-specific and you cannot use a version that came with the install media for another Mac.
I also suspect that another, very important clue is contained in the last version of BDAqua's first post.

The error code 4MOT/4/4000003:HDD-1393 has shown up from the apple hardware test. What should I do about this?

My iMac has been running a little hot, it was suggested to run the Apple hardware test (AHT), as heat can cause problems witht he hard drive.
The AHT revealed the error code 4MOT/4/4000003:HDD-1393 which I assume means a hard dtrive problem. But, what do I do. Is this a critical error or a minor fault. Everything is running as normal, but the machine is getting a little hotter than usual.

This indicates problem with HD fan.
Exact nature of the problem is only known to Apple.
We have no way to interpret this error code.
Keep a backup of your data.
When you get a chance, take the Mac to the nearest Apple store to have it tested.
Best.

Source for finding out error codes PB 17"

I ran hardware test and it returned an error code of:
21 SS / 1 / 5 : 0 x 42 (5)
and it was at the logic board test section...
Anyone know this code, or how I can find out what it is?

Google shows one result for this error code without the "(5)" and it seems to have indicated a sound-related problem.
In any event, when AHT shows errors, you really are best advised to take the machine in to have it looked at.
Good luck.

2MEM/1/4:DIMM2/J13 Error code

My PowerMac recently reported this error during an apple hardware test. I have the factory 512 ram installed, plus additional 6gb of ram in 1gb cards.
I still get this error message no matter which configuration of ram cards i use, e.g. if i move or remove ram from this slot i still get this error message (as long as cards are installed in this slot). The factory ram cards are the only ones i have not tested in this carousel method of hunting down the bad card. Any ideas? Would a defective factory card in the 1MEM slot cause this error?

Sorry, i had read a similar post which noted that "j13". My error code just notes 2MEM as the location, but that has always been the location of an added ram stick. It just hasnt mattered which one is in there, it always reports an error there. I just revised the RAM configuration (as my last try) to have all my 1GB sticks installed in 0MEM through 5MEM, took out the factory 256's, and reran the AHT. It just passed. So it appears a defective factory card in 1MEM causes a fault to show in the next slot back?

Error code meaning in hardware test

I have had problems recently and finally discovered an error when running hardware test. Can anyone tell me what the error means - it is obviously a dimm memory problem but what else does it tell me?
error code = 2MEM/1/4:DIMM6/J43
THANKS
PAUL

You could try re-seating the RAM in J43 or removing the RAM (and the other stick of the pair), in the suspect slot J43 - the position of which is shown here.
Note that AHT is not always wizzo on RAM faults - there is some more advice here
http://thexlab.com/faqs/aht.html

AHT Error codes

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