Apple Hardware Test, Take 2.

Sorry all, I somehow marked my previous take on the topic as answered. It isn't.
I have a Macbook Pro, 2,2, Core 2 Duo 2.16 GHz running Lion 10.7.1. I can't get it to do the Apple Hardware Test.
1) I have tried booting from my Snow Leopard install disc while holding down "D", it only booted into the main drive.
2) I have held down "D" while having the computer connected to the internet through Wi-Fi, because I have heard that the Lion test can be accessed from the interweb. It booted up into the main drive.
3) I do NOT have the Leopard install discs that came with the computer. I bought it second hand. I will be pretty ****** if I can't access the hardware test because some moron didn't have those discs. Not that it's anybody's fault... but **** it.
4) I do have Leopard discs that came with my Mac Pro. I guess I could try that.
Any thoughts?

Any Time Machine Back up or boot clone Back-up of Snow leopard will do.
Not included in Lion, however
Apple Hardware Test needs to be put back in place from a back-up /TimeMachine/ or SnowLeopard Back-up or install disk.
/System/Library/CoreServices/.diagnostics
Copy the ".diagnostics" folder from "/System/Library/CoreServices" on your original disk supplied with your machine to the same "/System/Library/CoreServices" location on your Lion installation.
Holding the D when booting again accesses the AHT.
/System/Library/CoreServices/.diagnostics
Easier if you show your Hidden files first!
defaults write com.apple.finder AppleShowAllFiles TRUE ;killall Finder
defaults write com.apple.finder AppleShowAllFiles FALSE ;killall Finder
MacBook Pro, Mac OS X (10.7.1), 2.4GHz IntelCore i5 320 HD 8GB RAM ParallelsDesktop6.0

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What are the meanings of Apple Hardware Test error codes 4m0t/4/40000003:hdd-1300 and 4m0t/4/40000003:hdd-1308?

what are the meanings of Apple Hardware Test error codes 4m0t/4/40000003:hdd-1300 and 4m0t/4/40000003:hdd-1308?

Thanks - Even though I'm years out of warranty I got chat help from Apple (I said they should help me since the codes aren't published.) We covered three different questions, and although I didn't get a specific decoding of the error code, I got confirmation of what other comments here imply - it might have helped that I indicated I'd already been here - and useful links to how to do back ups, including to CD(s). (I don't have a lot of data on this computer yet)
Now I need to figure out how to decide how hot-to-the-touch is "too hot" for the metal frame at the top of the iMac to decide whether I'm getting adequate fan performance or insufficient. While chatting I initially reported it was cool at the bottom and warm at the top. Apple hadn't asked, but their response prompted me to feel it again, and I'd say the top was hot, not warm - I updated but Apple didn't comment further except to conclude after addressing the other questions that I should take it in for further assessment - don't really want to bother with that.

Error Code After Running Apple Hardware Test

I ran apple hardware test (I'm having problems where my computer freezes for like 10 seconds with the mouse being movable... but it happens very frequently. like once a minute. it's SOOO ANNOYING)
this is the error i got after running apple hardware test:
(it came out as a Mass Storage error... which is Hard Disk i guess)
**ERROR*CODE***ERROR*CODE**
2STF/8/3: S-ATA Bus 0-Master
**ERROR*CODE***ERROR*CODE**
Does anyone know what I can do to fix it. Apple Hardware Test only allows me to find the error and then restart or shut down... which is useless cause what is the error code supposed to mean. I've only got Apple 1 yr repair support left... so I cant call up Apple or anything. Does anyone know anything about this and what I could do to fix it!?
I know about this: http://www.apple.com/support/imac/repairextensionprogram/
I might go to the apple store, but I dont wanna make a trip out there for nothing.
Does anyone know what I can do or should I just take it to the apple store.

Actually, i just spent like 1 hr working with disk utility using the os x install disk and i think it finally worked. im so happy for myself! yay... i wouldnt accept no for an answer. Disk utility kept saying "oh first aid failed because it didnt exit right" or something... total garbage response... i kept pressing verify disk and then repair disk and then i did the verify permissions and repair permissions too... didnt really know what i was doing with the permissions... but it finally worked so thats all that mattered! yay... its back to normal!!

MacBook won't boot after trying to repair with Disk Utility. Cannot boot in Safe Mode. Just powers down after about 5 minutes. Apple Hardware Test says error 4SNS/1/40000001:IG0C-0.265 But I cannot find anything on the net about it. MacBook 4,1 Intel.

Hello Everyone,
I am in dire need of assistance I am hoping someone could provide. I have a MacBook 4,1 with Intel Core 2 Duo processor 4GB Ram. It is taking over 10 minutes to boot up past the gray apple screen when I turn it on. First I cleared the PRam (?) then I checked the disk using Disk Utility Verify, and it said the disk needed repairs. So I ran the disk repair and it said it was unable to fix the errors on the HD.
I did a little research and tried booting into the Single User mode, then running /sbin/fsck -fy. It said that it found errors but could not fix them. I ran it two more times as suggested and got the same result each time. I then tried rebooting and now instead of taking 10 minutes to boot up, it takes about 5 minutes on the gray apple screen and then just turns off. I started in Verbose mode to try to troubleshoot the error and it appears the last thing to come across the screen before power down is a message "Apple Yukon 2: RxRingSize <= 1024....etc".
I decided next I would run the Apple Hardware Tester. The test came back with an error code "4SNS/1/40000001:IG0C-0.265". I am very good at searching the web but I could not find any errors that had the IG0C or IGOC or any combination at the end, but plenty of 4SNS/1/40000000(1) errors with different endings. From what I can tell people are saying anything with 4SNS/1/4000000 is a logic board failure, but this computer was literally just booting this morning until I did the /sbin/fsck -fy.
Any suggestions are welcome and appreciated.
Thank you for your time.

You've a couple of issues .... when Disk Utility tells you it can't repair a drive, if the error is a soft error, like an invalid tree or node, Disk Warrior (or TechTool Pro) can handle it. However, if Disk Warrior (or TechTool Pro) can't handle it, you can erase and write zero's to the hard drive and restore to it, or you can buy a new hard drive. Sometimes running SMART Utility can provide additional insight into the health of the hard drive.
THe 4SNS error is a sensor error. You could install iStat Pro to see if something is indeed getting too hot or remaining room temp or less. You may need to take it into an Apple shop so they can use their thermal diagnostics to test and isolate it further.

How do I run Apple Hardware Test on a 2012 MacBook Air with 10.8.4?

Hello everyone,
I am trying to run Apple Hardware Test on a mid-2012 MacBook Air with 10.8.4 installed. Whenever I restart and hold the letter D my computer goes into internet recovery mode and asks me to connect to Wifi... Please help, thanks!

Using Apple Hardware Test on computers with OS X 10.7 or later
Mac NoteBook and Desktop computers shipping with OS X 10.7 or later have a partition on the hard drive or flash storage that contains AHT. To start AHT on these computers please follow these instructions:
Press the power button to turn on your computer.
Press and hold the D key before the gray startup screen appears.
It takes a minute or so for AHT to start up and inspect your hardware configuration. While this is taking place, an icon appears on the screen:
When the process is complete, select your language and click the right arrow. If you aren't using a mouse, you can use the up and down arrows to select a language and then press the Return key.
The AHT console appears. You can choose which sort of test or tests to perform:
To perform all of the basic tests, click the Test button or press the "T" key or the Return key.
To perform a more thorough diagnostic test, select the "Perform extended testing" checkbox under the Test button before you click the Test button.
Note: Your test results will appear in the window in the bottom-right of the console.To exit AHT, click Restart or Shut Down at the bottom of the window.
Some Macintosh computers that shipped with OS X Lion and later support the use of Apple Hardware Test over the Internet. These computers will start up to an Internet-based version of AHT if the hard drive does not contain AHT. An Internet-enabled connection via Ethernet or Wi-Fi is required to use this feature. Internet-based AHT functions the same as AHT on the hard drive or flash storage outlined above.
The Mac NoteBook and Desktop computers listed in Computers that can be upgraded to use OS X Internet Recovery will require a firmware in order to support the Internet version of AHT. Without this update you may see the behavior discussed in this article.
http://support.apple.com/kb/HT1509

Using Apple Hardware Test?

Hi, I need some assistance.
I've got a MacBook Pro from 2011. That have some hardware, I'm sure. Please see this post. https://discussions.apple.com/thread/6029708
So I'm trying to use Apple Hardware Test. http://support.apple.com/kb/HT1509?viewlocale=en_US
But I can't make it work. And I've read the instruction for using the Apple Diagnostics test as well. http://support.apple.com/kb/HT5781?viewlocale=en_US
And it seems to me to be exact same approach.
Using Apple Hardware Test on computers with OS X 10.7 or later
1. Press the power button to turn on your computer.
2. Press and hold the D key before the gray startup screen appears.
3. It takes a minute or so for AHT to start up and inspect your hardware configuration. While this is taking place, an icon appears on the screen...
To start Apple Diagnostics:
Turn off your computer if it is on by choosing Shut Down from the Apple () menu.
Press the power button to turn on your computer.
Immediately press and hold the D key until Apple Diagnostics begins.
If you previously selected a language for” the computer, a "Checking your Mac" screen will appear in that language.
Can anyone instruct help me? I've tried using 25 times enabling the AHT. But the little icon never shows. I just get the regular login screen after some time.
MacBook Pro early 2011.
OS X 10.9.2

Sweet, OGELTHORPE
That worked! Apple own instructions are really not impressive. Haha. ****.

Can't get Apple Hardware Test to work

So I'm trying to run the Apple Hardware Test. I start the computer up and hold "D". It boots into OS X like a normal startup. So, I plug in the Ethernet and hold option-D to do the AHT from the Internet. It tells me "Apple Hardware Test does not support this machine".
So, I try to install the "iMac EFI Update 1.8" from http://support.apple.com/kb/DL1493 (which is for my iMac model, which is a iMac (Mid 2010)), but it says "This software is not supported on your system." I also tried the later version, v1.9, from http://support.apple.com/kb/DL1498 but it isn't for my iMac and so I get the same error.
So now I'm stuck. What should I do now?

Thanks that was it. It says AHT on the disk itself. I successfully ran it, and it found no problems ("No trouble found.") I ran the basic test only because I have 16 GB RAM, and so I imagine it would take a long time to run the extended—probably at least two hours? And I don't know what more that would find that the basic wouldn't?

Error 4PRC in Apple Hardware Test

Hello,
I have a 24" iMac (2.16GHz Core Duo, 1.5GB RAM) from late 2006. A few days ago, the display went black although the power stayed on. I turned it off, and it hasn't been able to boot since then. Whether I try to boot normally, in safe mode, or from the install DVD, the same thing happens: (1) happy startup sound with gray Apple logo; (2) that screen darkens and *sort of* a kernel panic message appears in the center. I say "sort of" because the kernel panic message's rectangle is in the right place and some of its text is readable, but partway down the rectangle it looks as though the drawing is offset somehow. Anyway, that's how this problem manifests itself: a kernel panic very early in the boot process.
Miraculously, the Apple Hardware Test starts up successfully from the install DVD. Both the normal test and the extended test give the same result: the RAM passes its tests, but when it reaches the CPU, the following error message appears, and the tests stop:
4PRC/1/40000003: Processor
That looks bad. I searched the web and various forums (including this one) and found very little information. An Apple document marked "Error Codes, Apple Hardware Test version 3A117" suggests that the appropriate action is to replace the processor.
I suspect that if I take the iMac to my local Mac repair specialists, they will offer to expensively replace the motherboard. I'm an old UNIX nerd and have tinkered with lots of machines other than Macs; can I simply replace my iMac's CPU myself?
Or is CPU replacement in fact unnecessary, when some other fix might work? Does anyone have specific advice about this error message?

In case it's helpful, here's a textual description of the panic from single user mode startup (which fails just as badly):
hi mem tramps at 0xffe00000
PAE enabled
64 bit mode enabled
standard timeslicing quantum is 10000 us
vmpagebootstrap: 382549 free pages
migtable_maxdispl = 71
Enabling XMM register save/restore and SSE/SSE2 opcodes
84 prelinked modules
ACPI CA 20060421
AppleIntelCPUPowerManagement: ready
AppleACPICPU: ProcessorApicId=0 LocalApicId=0 Enabled
AppleACPICPU: ProcessorApicId=1 LocalApicId=1 Enabled
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
using 7864 buffer headers and 4096 cluster IO buffer headers
Enabling XMM register save/restore and SSE/SSE2 opcodes
Started CPU 01
panic(cpu 1 caller 0x001A49CB): Unresolved kernel trap (CPU 1, Type 14=page fault), registers:
CR0: 0x8001003b, C5å: 0x19d0010c, CR3: 0x0120f000, CR4: 0x000006e0
EAX: 0x037a9198, EBX: 0x037de760, ECX: 0x0041fa40, EDX: 0x037ffc80
CR2: 0x19d0010c, EBP: 0x1cfb3e58, ESI: 0x0378bdc0, EDI: 0x037602c0
EFL: 0x00010212, EIP: 0x19d0010c, CS: 0x00000008, DS: 0x00000010
Debugger called: <panic>
Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x1cfb3c38 : 0x128d0d (0x3cc65c 0x1cfb3c5c 0x131f95 0x0)
0x1cfb3c78 : 0x1a49cb (0x3d2a94 0x1 0xe 0x3d22b8)
0x1cfb3d88 : 0x19b3a4 (0x1cfb3da0 0x4b00d0 0x1cfb3dc8 0x4)
0x1cfb3e58 : 0x3c10b5 (0x37de760 0x378bdc0 0x1cfb3e88 0x389d2b)
0x1cfb3e88 : 0x38af5f (0x37de760 0x378bdc0 0x1cfb3eb8 0x38998b)
0x1cfb3eb8 : 0x38ed6e (0x3821f00 0x37602c0 0x37de764 0x3821f08)
0x1cfb3f38 : 0x38ebb5 (0x3821f00 0x37ffe40 0x0 0xffffffff)
0x1cfb3f88 : 0x3902fa (0x3821f00 0x0 0x134db9 0x390228)
0x1cfb3fc8 : 0x19b21c (0x380dd50 0x0 0x19e0b5 0x375c3b4) Backtrace terminated-invalid frame pointer 0x0
Kernel version:
Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu-792.25.20~1/RELEASE_I386

Imac 24 aluminum - apple hardware test using wireless keyboard

The manual that came with my imac describes the steps to run the apple hardware test as follows:
1. disconnect all external devices, except keyboard and mouse
2. restart mac holding the 'd' key
The apple hardware chooser should appear next.
When I do these steps it goes right to my desktop every time. I am running a mac wireless keyboard and mac mighty mouse.
Anyone have an idea how I can get the Apple Hardware Test up?
Thanks.
Message was edited by: pathfinder31

Hi,
It can take a few minutes for the AHT to appear after booting, D key, etc:
http://support.apple.com/kb/HT1509
Try shutting down your iMac, reboot and THEN do the AHT.
Are you able to boot from the restore disk?
To check the hard disk:
Open Disk Utility, in the Utilities folder in the Applications folder.
Insert your Mac OS X Install disc in your computer’s optical drive or an optical drive connected to your computer, and then restart your computer. When you hear the startup tone, hold down the C key until you see the progress indicator, which looks like a spinning gear.
Follow the onscreen instructions until the Menu Bar appears with the Utilities menu in it, choose Utilities > Disk Utility, click First Aid, and then click the Verify button. If DU reports errors, click Repair. When it's finished, from the Menu Bar, select Utilities/Startup Disk. In the Startup Disk window select MacintoshHD 10.x.x and click Restart.
Carolyn

Will Apple Hardware Test definitely detect RAM errors?

Hello,
Been having various problems with Leopard/MacBook. Someone suggested running Apple Hardware Test, which I did, in extended + looping mode all night (it cycled 6 times). The test turned up nothing. Can I take this to mean that whatever problems I am having are definitely software related? I am not familiar with the AHT, don't know exactly what it does, nor how I can interpret a "clean" result...
Many thanks for any advice/tips.

No indeed (just "Colin" is fine...)
My problems have mostly been documented by other people, and I have just been monitoring the discussions on these issues.
Specifically (at the risk of getting off-topic):
1) inconsistent shared server behaviour: I have 3 other macs at home - an iBook and a G4 MiniMac running Tiger, and a G4 tower, also running Leopard - and most of the time, the tower doesn't show up at all, but I can connect to it via CMD-K, the MiniMac shows up in the sidebar, but won't let me connect, and the iBook, when it is running, behaves normally. Oh, screen sharing doesn't work either: it tries connect but hangs (except for the iBook, which works). I could connect to all four quite normally after upgrading to 10.5.0, using the sidebar icons. Everything worked fine until sometime after the 10.5.1 update, when suddenly everything went pear-shaped. Nothing has changed in the configs of the other machines, and the iBook and the MiniMac are identical in terms of software config (but behave differently as regards this problem?!?)
Closing Airport and reopening it makes the icons reappear in the sidebar (all of them, G4 tower included), as does relaunching the Finder, but doesn't change the behaviour: I still can't connect. When I try to use the sidebar icon for the tower, it disappears (the icon...)
As far as I can tell, trying to operate shares from the G4 tower works as Apple intended (although I admit I have not exhaustively tested every option, as I don't have unlimited time...)
2) Lost my printer connections, both at work and at home. I managed to reestablish them at work, but I tried so many things that finally I'm not sure what actually worked. No dice at home (shared printer on the MiniMac... same problem as (1) I guess.)
3) the dreaded Keynote spontaneous reboot problem (I placed a reply about that last night here:
http://discussions.apple.com/message.jspa?messageID=6630702#6630702
4) diverse weird things, like
4a)iCal which had doubled all my events the last time I opened it. I had to manually delete one copy of every event I had entered, whereas I made these entries several weeks ago, and had consulted them many times... I'm thinking this is perhaps a result of the brutal reboots caused by (3)? Having deleted all the doubles, iCal seems to be behaving normally again.
4b)screen resolutions on my slave screen suddenly failing to select properly. I move my MacBook between two different external monitors, one at work, one at home, and their resolutions are different. Initially the MacBook had no trouble detecting and correctly setting the resolutions for the two screens, then suddenly my home screen went weird on me, and required a manual reset. Again, this was a once-off, and does not seem to be repeating (yet).
4c)sluggish performance with some apps that are normally quite snappy, like Firefox, which seems to hang a lot loading pages, Keynote (saving is often painfully slow), and indeed, trying to copy a 250Mb file from the tower to the MacBook via Airport (having connected using CMD-K) said it was going to take 33 hrs, which I thought was a bit rich...
4d) hot-swapping a usb pin for a keyboard+optical mouse receiver from the tower to the MacBook sometimes causes something inexplicable to happen to the MacBook's keyboard: both the Caps and the NumLock LEDs come on, and the keyboard has jumped into some config other than what it is normally in (French). I have not been able to determine what the keyboard actually thinks it is when this occurs (3 times now). The command keys (ctrl, alt, cmd) do not appear to work at all. Rebooting corrects it.
All up, pretty irritating, and a huge time waster, as you can well imagine. I stuck a bit of a rant on the discussions the other day in a moment of intense frustration, which got zapped by the moderators (probably not unreasonably!), but not before someone replied suggesting that it might be bad RAM, hence my questions here.

Apple Hardware Test & My Power Supply

I was wondering if the Apple Hardware Test does any check on the Power Supply.
I was planning on replacing mine on a Mac Pro (Early 2008). I have been having a constant freeze from wake issue, and the system refuses to power on from a cold start unless I let it rest unplugged for 24-48hrs.

Assuming it is/was getting good power and there aren't any problems with power itself, it sure sounds like SMC or logicboard or something.
Can't hurt to do an extended test.
The wake from sleep freeze type issue for 2008s early on was suppose to be fixed and resolved by an EFI firmware update last year (Apr/May time frame?).
I'd take it in.
Sometimes swapping parts is all that can be done to see if a component is at fault.

Apple Hardware Test Freezing During Probing...

How long does the Apple Hardware Test to Probe?
I only have the keyboard and mouse plugged in...
and it still takes ages...
What is going on?

Well upon doing everything I can think of...
I use a Microsoft Mouse... and I removed it and replaced it with my old mighty mouse and now it doesn't freeze! and my mac is ok! It passed all the tests

Built-In Apple Hardware Test

From my understanding, all new Macs have Apple Hardware Test built in directly to the EFI. Does this also apply to the Mid-2009 MacBook? I tried holding 'D' on startup but just ended up with a white screen. Is there a different keystroke?

How to run hardware diagnostics for an Intel Mac
Boot from your original OS X Installer Disc One that came with your computer. After the chime press and hold down the "D" key until the diagnostic screen appears. Run the extended tests for a minimum of two or three hours. If any error messages appear note them down as you will need to report them to the service tech when you take the computer in for repair.
Some "common" error indicators:
SNS - sensor error
MEM - memory error
HDD - hard disk drive error
MOT - fan error

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.

Where do I find a list of error meanings for Apple Hardware Test?

I think My 27" mid 2011 iMac has a faulty thermostat on the ODD. I ran the Apple Hardware Test and the error message was 4M0T/4/40000002:ODD-0. Where can I learn what this error code actually means?

That error message means that there is a problem with the optical drive fan motor. I recommend you to make a backup of your files and take the Mac to an Apple Store or reseller in order to prevent any problem.
Here you can find a list of Apple Hardware Test messages -> http://www.macissues.com/2014/03/21/how-to-run-and-interpret-apples-hardware-tes ts-on-your-mac/

Apple Hardware Test, Take 2.

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