Cannot access Apple Hardware Test

I recently learned about the Apple Hardware Test, and decided to run it, just to see if it reported anything wrong.
I have a MBP from early 2008, 2.2 GHz Core 2 Duo, 15.4".
The built-in optical drive no longer reads DVD-type media. It will read CDs, but not DVDs of any kind. This has been verified by an Apple Genius; it needs to be replaced.
I have a Snow Leopard disc in an external drive, connected via USB. When the Mac is running, I see the Snow Leopard disc; I can access normally.
However, when I restart (or turn off, then on) the computer, and press and hold 'D' right away, nothing different happens; it boots into OS X just as it normally does. I have tried this a few times, both restarting and turning off then on, holding down the 'D' key right away.
Is the problem that the OS X disc is in an external drive? If this is the problem, then how is the AHT accessed on a MacBook Air?
Is the problem the Snow Leopard disc itself; does it not have the AHT on it to begin with? I can no longer locate the original 10.5 discs that came with my computer, but I believe I may be able to get ahold of a relative's later-version 10.5 discs.
Or is there some other problem or something else I'm doing wrong?

Hi again Justin,
Justin J. Rebbert wrote:
Well, as I mentioned in my original post, no, I do not have the original Leopard discs that came with my Mac. But as I also mentioned, I can probably get ahold of a set of Leopard discs that belong to a relative. One thing I did not mention, though, is that I'm pretty sure these Leopard OS X discs are retail (did not come with a computer). Do you know for sure whether or not regular Leopard discs have the AHT on them?
Yes, 100% certain. AHT comes only with the original discs that were supplied with your model MBP.
eww has suggested a link for you where they can be purchased for $33. However, with an internal optical drive that cannot read CDs/DVDs, your only options are:
1. Repair/replace the internal optical drive.
2. Purchase an external optical drive.
3. Create a partition in your external drive and then using either Carbon Copy Cloner or the Restore feature within Disk Utility, create a bootable image of the original OS DVD. When you start up from this bootable image it behaves in exactly the same way as if you started up from the OS DVD.
Justin J. Rebbert wrote:
I have no idea what you're talking about when you "like you did with Snow Leopard". I didn't have to make bootable images or use different partitions or anything like that at all, and I don't know what made you think that.
My apologies. In your original post you said:
I have a Snow Leopard disc in an external drive, connected via USB. When the Mac is running, I see the Snow Leopard disc; I can access normally.
The above made me conclude that the "external drive" was an external hard disk drive. Reading it again, I can see that you mean it's an external optical drive.
Now, I know that eww, in his reply to you stated the following:
I don't believe AHT can be run from an external drive. It requires all external devices to be disconnected except the AC adapter.
eww is very knowledgeable and well respected in these forums so I'm hesitant to disagree with him. I believe that one can carry out a AHT from an external optical drive but will test later today or tomorrow to make sure.
Justin J. Rebbert wrote:
Also, just FYI, from what I've read about accessing the AHT in other posts on these discussion forums, apparently all Macs (of a certain unknown vintage and later) have the AHT accessible from the hard drive, but this is only true if it's the original hard drive, which furthermore has never been reformatted. My MBP's hard drive is an upgraded (bigger and faster) replacement, so unfortunately, that's no longer an option.
No, it's not only true if it's the original hard drive.
It is, however, true if the OS on the replacement hard drive was installed using the original disks that came with that model Mac. The OS can the be upgraded to a later version but the fact that the original OS DVDs were used then, assuming the Mac model is of the vintage that allows it, a hidden small partition is created thus allowing the user to boot into AHT without needing the original discs to start from.
Da Vinci

Similar Messages

How to access Apple Hardware Test?

I just installed a fresh copy of Lion over Snow Leopard hoping that I woul be able to use the AHT but it just starts up like normal when I hold the D key... I've tried it a billion times. Anyway I can put the AHT on my iMac? It's an A1224.

When you upgrade OS X or you erase the hard drive, Apple Hardware Test stops being saved on the hard drive. If you want to run Apple Hardware Test, you have to insert the Mac OS X disc which came with your computer and start the computer holding the D key. Read > http://support.apple.com/kb/ht1509

Mac Pro 5,1 - cannot initiate Apple Hardware Test

I have a Mac Pro (mid-2010 3.2 GHz Quad-Core Intel Xeon). I am fairly certain that it came with no disks. I have the manual in hand, and it advises to restart while holding down the D key. The point that I am making by reporting that is that those directions effectively confirm that there is no disk to insert.
These are the same instructions given in the Apple online support documents (http://support.apple.com/kb/ht1509).
Those instructions include :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:
I believe that I have held the D key for a considerable amount of time (no, I've not timed it) and have only seen the gray startup screen. I had given up waiting, released the D key, and waited some more, with no evidence that anything is happening. Eventually, I held the power button to shut down the system, then restarted normally.
Have I been impatient? Do I need to hold the D key until the icon appears? How long should I wait? Does the fact of my 16GB RAM and considerable HD space impact the timing? Although the instructions advise detachment of all peripherals (except the essentials), is that an absolute necessity?
Thanks for your experienced answers.
Brian

Mid-2010 came with OEM 10.6.x build on DVD. Later in 2011 summer they may have shipped with Lion but you could request the OEM DVD set.
There is no ROM firmware to do AHT over the net though regardless one way or another, the 5,1 lacks that ability.

How to start Apple Hardware Test under OS X Lion

Since I made the upgrade to OS X Lion I cannot start Apple Hardware Test with the old method that works under Snow Leopard.
Under OS X 10.6.8 I used to keep D key pressed until a picture appeared in the middle of the screen. With Lion it doesn't work, even under Wi-Fi internet connection.
Any suggestions?

Have a look at this discussion https://discussions.apple.com/message/15772841#15772841
Stefan

Can anyone explain why I cannot restart my computer after apple hardware test with no problem found

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Have you read for possible solutions over in the "More Like This" thread over here?----------------------->

Hi I need Apple Hardware test 2.5.2 Apple does'nt have it. Any one on here have a copy or know how I could get access to?Thaks

hi I need Apple Hardware test 2.5.2 Apple does'nt have it, I orderit it and they no longer carry it so they say. Any one on here have a copy that I could get access to?Thanks

What model PowerMac do you have? The AHT is on the Install/Restore disc that came with your Mac.
 Cheers, Tom

Cannot start-up to the Apple Hardware Test — MacBook Pro & Lion

Whenever I try holding the D key before and throughout all of the start-up process, it simply makes the grey screen appear for longer, and slow the whole process... but never beings the Apple Hardware Test.
I'm following Apple's official instructions:
To start up your computer in Apple Hardware Test:
Press the power button to turn on your computer.
Press and hold the D key before the gray startup screen appears. An Internet-enabled connection via Ethernet or Wi-Fi is required to use this feature.
Note: Some Macintosh computers that shipped with OS X Lion 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.
Why doesn't it work?
My MBP was shipped as follows:
For Apple computers that shipped with Mac OS X v10.5.5 to 10.6.7, Apple Hardware Test is located on the Applications Install Disc 2 and should be included with your computer.
But I have upgraded to Lion! Do I need the disk still? If so, why am I to lumber around a disk from a previous OS... good that I didn't throw it out!

I'm trying to find the answer to a similiar question. Here's my thread.
https://discussions.apple.com/thread/3549995

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.

Files/Folders Sticking to Mouse Pointer - Not Releasing (Reset PRAM & Apple Hardware Test Fail to Run)

I've been having two issues with my Late 2008 MacBook Pro 15-inch - Running OS X 10.8.5 (Mountain Lion). Unable to Reset the PRAM and Run Apple Hardware Test (AHT).
On a random basis - File/Folder icons are Sticking to the Mouse Pointer - Not Releasing. I've done everything from trashing finder preferences, making sure Universal Access preferences are off, Restoring Defaults in the Energy Saver System Preferences, Resetting the System SMC. Another post mentioned that this is being caused by the Graphics Driver not working correctly - and mentioned to put the MBP to sleep, then wake it up, and the files/folders are no longer sticking to the mouse pointer. This works for me and released the sticking items in the Finder.
OK, Good this is a simple fix, BUT, what is really causing this issue, and how may it be fixed or repaired?
I also tried to Reset the PRAM and Run the Apple Hardware test (AHT), and these both fail to run on my MacBook Pro with OS X 10.8.5.
1) Resetting the PRAM:
Shut down the MBP, press the power button, and hold down at the same time <option><command>-P-R. The Reset PRAM process never starts up, but rather I receive the Padlock/Password Login which logs me into the Restore System Utilities. I'm unable to Reset the PRAM.
2) Apple Hardware Test (AHT):
Shut down the MBP, press the power button, and hold down the "D" key, the system boots up as normal and does not enter the AHT.
The File/Folder Finder sticking to the mouse pointer issue is very annoying. Does anyone have a solution to resolve this issue?
- Cheers

HI Barbara,
It sounds like the hard drive is failing or has failed. Boot from your Mac install disc and if you can run Disk Utility in case the startup disk needs repairs.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
*(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)*
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. *Make sure there is always 10% to 15% free disk space*
If you cannot boot from your install disc, try booting in Safe Mode
What is Safe Mode
Carolyn

Won't Boot to Apple Hardware Test or accept Boot Commands

Hi All,
I would appreciate some help with this issue, I am trying to boot up to the Apple Hardware Test on my Install Disk 1 that shipped with my MacBook Pro 2.4GHz Model #A1226 ordered new with 4 gigs of memory (around Aug. 2007). I am currently running 10.5.6 and the install disk of course contains the Tiger OS. I have nothing plugging into my computer, other than the Power Adapter. I have the proper install disk inserted in the computer and am holding down the "d" key on my built in keyboard throughout startup, but it will not go to the AHT. It simply boots to the normal login screen for Leopard. In fact the only boot commands that I see any visible or audible confirmation that it has taken effect is the option key, taking me to selecting a Startup Manager and holding down the Power Button gives me a tone from the internal speaker after a few seconds.
Below are what I have tried with seemingly no effect:
"d"
"c"
"t"
Option-Command-"p"-"r" (no beeps)
Command-"v"
Command-"s"
Shift (not sure I should see or hear any confirmation, I don't have any login items set right now so I can't tell if it has any effect)
I have not tried an of the networked drive boot commands as I don't have any networked drives
The only way I have been able to boot from either the optical drive or another disk is either holding down the option key during boot up or selecting the drive from the startup manager in system preferences.
I can't seem to access the AHT an in any way. The reason I am trying to access it is because I have had a few weird intermittent problems that I can't put my finger on and would like to be able to rule hardware out.
I also just replaced my HD with a WD 320 gig drive after my original drive failed due to a physical error. I just restored my data, and all seems to be running well after a permissions repair and a disk repair while booted up on my install disk.
The intermittent problems I was talking about are very vague and rare so I is difficult to describe them other that just a hunch that something is still a bit off. One is the display, every once in a while, showing what looks like a massive bar code or UPC code on my screen. This is not like the bands with soft edges that seem to be a well documented issue with the early MBP but transparent lines of alternating width and brightness with hard edges. Again it looks just like a UPC code transposed on my screen. The other items are random freezing of the OS or the mouse and the fact that my keyboard does not respond to any but a few boot commands. Again all the things are either rare and intermittent or do not come up in daily use of my machine. But when taken together, seem to add up to the conclusion there is still some issue present (at least in my mind).
To recap my specific questions relate to not being able to run the Apple Hardware Test and many of the boot commands having no effect. If you can shed light on the other items mentioned, great!
Thank you!

At a guess, I would think this error code has to do with the video artifacts you are experiencing. You might try reseating all the cables to the display. If the position of the screen makes a difference, there may be damage to a cable, particularly where it goes through the hinge.
Apple is the keeper of the error codes. If you have access to an Apple Store, you could probably ask about this.
Don't know about the other intermittent problems. Does an external keyboard work? If so, there's likely a problem with the internal, maybe even again, a cable or connection.
You could also try creating a new use account and see if the keyboard and mouse problems persist. If not, there could be some sort of software corruption in your usual account. Ditto with the freezing.
Good luck!

Disk repair and Apple Hardware Test says HD has no problem but grey screen still persists on MBP

5 days ago while on vacation, my MBP just froze with the grey screen, apple logo and spinning gear.
I performed all that was instructed on the following discussions:
http://support.apple.com/kb/TS2570
except Archive and Install installation of MAC OS X and Erase and Install MAC OS X since I was able to save my files in my husband's MBP via Firewire Target Disk Mode. At this point, I am still apprehensive in erasing my files and installing again the MAC OS X.
When I did the Disk Repair under the Disk utilities, it says that my Mac Os X is ok. (It also said ok when I did the fsck -fy when I till did not have my CD when I was on vacation)
I also tried the Apple Hardware Test (AHT) to further l test the hardware of my MBP and performed an extended checking and after an hour, its says that my HD has no problem.
Yet, after all these, when I restart my computer, it still has the grey screen with apple logo and spinning wheel!
Can anyone tell me what else can I do??? Appreciate any help!

I like the free demo of SuperDuper to make clones. It's free, Leopard and Snow ready and is easy to use. If you buy the full version you can do incremental backups.
You should use Disk Utility to do a Disk Repair, as shown in this link, booted up on your install disk, before you make a clone of it. I use DiskWarrior for that instead.
I then partition my external disk, in Disk Utility, with a partition that is the same size , actually a tad bigger, as my system disk. I then use SuperDuper to clone my system disk over to that partition.
With a clone on an external FireWire drive (USB drives are not bootable on PPC Macs but are on some Intel Macs) you can bootup on it to do your repairs, on the main drive, or just run your Mac anytime you have trouble with your main drive.
That's why I like clones better then Time Machine. You can just bootup on them and use your Mac.
On the DiskWarrior thing, I use DW once a month to try and catch errors in my system from getting too far out of hand. It has repaired every little and big issue I have ever had with my three Macs.
And I have had times when Disk Utility's Disk Repair says everything's fine but my system was still having issues. Disk Utility, in my experience, cannot be totally relied on to find and report all issues. It just isn't robust enough.
I run DiskWarrior, it does find errors, repairs them and I'm back in business. I swear by it!
DALE

-3403D error when attempting Apple Hardware Test

Hi everyone,
I want to perform an Apple Hardware Test. I restarted, pressed option+D, and a globe appeared. After a minute, however, the following text appeared:
Apple.com/support
-3403D

Your Macbook Pro came with OS X 10.6.x and to run Apple Hardware Test you can use bundled with your Macbook Pro Application Disc:
Using Apple Hardware Test - Apple Support
Your Macbook Pro probably was upgraded to use OS X Internet Recovery as some of the Mac which came with 10.6.x did have that option. It seems like, some of the models might have problem to access Internet AHT:
Computers that can be upgraded to use OS X Internet Recovery - Apple Support
About the "Apple Hardware Test does not support this machine" message - Apple Support
Not sure what error -340D means but if you haven't tried yet, i would suggest to turn OFF your router and after 2-3 mins turn ON again. Try with different network as very often issues with starting Mac in Internet Recovery are caused by network settings. This could be the same issue...

! ! ! G4 Mirrored Door: stuck in Apple Hardware Test??

iWork'09 wouldn't install, so I thought I'd run Apple Hardware Test (never done that). I found the disc that came with my machine and rebooted. The first line was notice of +invalid memory access+, but I was asked to type "mac-boot", so I typed mac-boot. The next screen looks like this:
+invalid memory access at %SRR0:05610dc %SRR1:00003030+
ok
0>_
It's just sitting there like that. What am I supposed to do?
Thanks.

Will it boot in Safe Mode? See
What is Safe Boot, Safe Mode? (Mac OS X)
http://docs.info.apple.com/article.html?artnum=107392
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://docs.info.apple.com/article.html?artnum=106214
 Cheers, Tom

Apple Hardware Test Error IP6M

Hi everyone
I'm only asking this here because I've completely exhausted my google-fu. I bought a used Mac Pro that's still in its warranty, and I'm getting this error from Apple Hardware Test:
4SNS/1/40000001:Ip6M-0.976
I managed to find out that the 4SNS part means it's a logic board sensor error, and that the crucial part is the IP6M bit, which in Service Diagnostic manuals points to:
PP12V_S0 MLB2 240V A Main Current
Honestly, I have no idea what that is.
Googling for this error, I found out this support page
http://support.apple.com/kb/TS4051?viewlocale=en_US
which states that "Although the diagnostic displays the alert that the hardware does not pass for this specific sensor, the computer can be considered as passing."
So, it's apparently a false positive.
This is not enough to convince me that the computer hardware is solid, specially because Apple Hardware Test cannot complete its tasks once it finds this error, so it's possible that there could be more.
I took it to an authorized Apple repair center, and they replaced the video card and a backboard panel (no idea what that is). They told me nothing about this particular error.
Anyone got more info on this? Should I be worried?
Is there any other way in which I can properly test this machine?
Also, in case I need to resell this computer, I'm at the risk of potential buyers refusing the machine due to this error. Anyone knows if updating it to Mountain Lion will fix this false positive?
System Info:
Mac Pro 5,1 - mid 2012
OS X 10.8.2
Quad 3.2
6GB Ram
Radeon 5770

I forgot to mention that even after the computer went through the Apple repair center, the error persists. I don't even know why they replaced parts, because apart from this error the computer was fine.

How to obtain apple hardware test for MacBook Pro (15-inch, Mid 2009), how to obtain apple hardware test for MacBook Pro (15-inch, Mid 2009)

I no longer have the software disk (OS10.5) that came with my MBP in July 2009. I only have the $10 Snow Leopard disk from Apple, which does NOT seem to contain any Apple Hardware Test (AHT). I have tried starting while holding d or option keys to no avail. Does neither my laptop nor OS 10.6 install disk have AHT? If not, can the appropriate AHT be obtained? My wife has an older MacBook & her original 10.5 install disk, but it will not launch AHT in my MBP. Any suggestions?
Thanx

I like the advice to contact Apple and simplky pay for a new AHT. I did that, giving them the serial number of my MBP and indicating it was a June 2009 model, 2.66 gHz Core 2. However .....
I received yet another Apple FedEx shipmet with yet another different Mac OS X Leopard install DVD; this makes three in all!! Just as with the 1st DVD, these two will NOT mount on my desktop, are NOT seen by Disk Utility (or by Drive Genius) and cannot boot my MBP laptop in either of 4 different modes: (1) start-up with "d" (2) start-up with "option d" (3) start-up with "option" (4) start-up with "c". Apparently none of the disks I received have Apple Hardware Test on them, although that is what I paid for in early December. It may be that the last two disks really do have Mac OS X Leopard on them, but because I am now running OS 10.7.5 (purchased from App store with no AHT), the disks cannot be seen by my laptop.
          The two most recent incorrect DVDs I received have the following part numbers:
                    SRF2Z691-6037-A [indicated on packing slip 10.5 Retail-International]
                    SRF2Z679-6341-A (indicated on packing slip 10.5.6 Retail (PCrly 09) In]
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          I suspect that Apple's cost to ship 3 incorrect DVDs by 1- or 2-day FedEx vastly exceeds the $17.44 price I paid for a working version of AHT for my computer, but have yet to receive.

Cannot access Apple Hardware Test

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