Apple Hardware Test DISABLED by update?
Maybe I'm jumping to conclusions. Is there a way to get this feature working again?
MacBook (Late 2007) has a cool undocumented feature... hold the D key at startup, and Apple Hardware Test (AHT) launches--WITHOUT THE DVD. Yes, it's built-in.
Sadly, this feature seems to have been disabled by a recent update... possibly the Keyboard Firmware Update
Sigh. Now I have to drag out my clunky old DISC just to quick check TBOT
see other posts here regarding 4SNS/1/40000001:TBOT error in AHT
Try starting the AHT with the OPTION + D keys.
You should be able to use the #2 install disk. It has the AHT instructions on it.
Ciao.
Similar Messages
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So as u know the question
ill tell u the steps to try them out(no harm will be caused to u or ur com)
During restart-up press the D button before the gray screen appears and hold it for about a minute until u see a 4 or 6 bit image of old mac icon appear and then it loads u go select any language and click hardware test full and then tell me if it DOES HAPPEN ON OS X 10.8(mountain lion).
Thnx apple and u guys!To use Internet Apple Hardware Test, start up your Mac and hold down both the option and D keys on your keyboard.
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Apple Hardware Test won't load
Hi,
I'm running OS 10.9.4 on a late 2011 MB Pro and am unable to boot up to the Apple Hardware Test partition. Also won't boot to system install USB flash drive. Any help wold be much appreciated.It's option key to boot AHT cd. You can run it, but firmware and OS updates makes the disk veriosn obsolete. So don't panick over a false positive.
I would backup files and c boot from the installer disk, select Disk Utility and Repair Disk/Permissions see if that works. Also disable hard drive sleep in System Preferences>Energy
If not repeat above and Erase w/Zero option and reinstall the OS. If your going to bother with all that, might as well make the jump to Tiger and iLife '06 (not included with Tiger) -
COOL FEATURE-Apple Hardware Test built-in. No disc needed!
It's a MacBook Late 2007... it would be interesting to see what other models have this feature.
Start the Mac
hold the D key
do NOT put in your installer disc
it starts up Apple Hardware Test (AHT) in like 5 seconds. No disc needed. VERY COOL
(unfortunately, it seems to have been disabled after I did the Keyboard Firmware Update) -- 2 units, same issue.
Is there a way to get this feature working again?
What other models have (had) this feature?Well, I've tried some experiments:
1) Removed the hard disk from the MacBook, and tried starting up while holding down the D key. Question mark icon. So apparently the AHT is not in ROM, but ensconced somewhere invisibly on the HD.
2) Put the HD back in, started the MacBook from a standard, late-2007 retail 10.5.1 Install DVD (not the Install/Restore DVD that came with it). No AHT of course. And when it started up, the backlight went dark. Shining a lamp on the screen and looking from an angle, I was able to see enough to erase the HD. And tried starting again with the D pressed. Question mark icon. So apparently the AHT is not in a special HD partition that persists even when the HD is erased.
3) Installed 10.5.1 on the MacBook HD using the standard 10.5 Install DVD (not the Install/Restore DVD that came with it); once again, running the MacBook from that DVD turned the display backlight off. Then started the MacBook with the D key pressed. Question mark icon. So the standard, retail 10.5 Installer doesn't install the AHT.
4) Started the MacBook from its own Install/Restore DVD, and restored the factory HD setup. When setup was finished, shut down and started again pressing the D key. Apple Hardware Test (v.3A143) appeared.
Conclusion: Apple Hardware Test is on the hard disk, not in ROM, installed as part of the software specific to this model. If the disk is erased and System software is installed from a generic 10.5 DVD - for instance, because the original Install/Restore DVDs have been lost - AHT will not be installed. So the instructions in the manual apply only so long as the original disk setup (or a restoration of same using the original DVDs) remains. Otherwise the original Install Disc #1 will be required to run Apple Hardware Test. -
COOL FEATURE - Apple Hardware Test (AHT) built-in. No disc needed!
It's a MacBook Late 2007... it would be interesting to see what other models have this feature.
Start the Mac
hold the D key
do NOT put in your installer disc
it starts up Apple Hardware Test (AHT) in like 5 seconds. No disc needed. VERY COOL
(unfortunately, it seems to have been disabled after I did the Keyboard Firmware Update)Some G5s had a firmware update that caused problems with the version of Apple Hardware Test that shipped with the G5. The Latest G5 Apple Hardware Test is 2.2.5
Call Apple and see if you can get it.
Another hardware test is TechTool Pro
<http://www.micromat.com/index.php?option=com_content&task=view&id=31&Itemid=48>
Meanwhile, try testing with some of the RAM removed. Try different combinations of RAM modules and slots. Always use them in pairs. -
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. -
How do I use Apple Hardware Test on a Mid 2010 macbook pro?
This MacBook is now running Mavericks 10.9.1
This makes it so I can't update the firmware to use Apple Hardware Test within OS X internet recovery as discussed in this article:
http://support.apple.com/kb/ht4904
Holding down "D" at boot does nothing
Holding down Option + D gives me Apple Hardware Test that can't be run because the firmware isn't updated and can't be updated because the update can only be applied to systems running Mac OS X 10.7.2You need the origional grey disk 2 that came with the mac when new. It contains the AHT and applications. You can call Apple and order the disks.
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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 -
Apple Hardware Test (AHT) is GONE!! after Lion install
After installing Lion on my new early 2011 MBP the AHT is gone...
Pressing "D" will not load the AHT (it was installed and working fine in my MBP prior to Lion).
I called the APP hotline to inquire about it and the technician couldn't boot into the AHT on all the macs with Lion available to him.
(a report has been filed with the engineering team)
According to the newly updated KB: http://support.apple.com/kb/ht1509
QUOTE: "Some Macintosh computers that shipped with OS X Lion support the use of Apple Hardware Test over the Internet."
After pressing and holding the "D" key the Mac just loads into the desktop... There is no online AHT or pre-installed AHT available...
>> Is anybody else having this problem?? <<
If you are having the same problem maybe you should also report it to Apple: http://www.apple.com/feedback/ or the APP hotline...HOW TO FIX THE AHT PROBLEM IN LION:
Just to clarify what Francisco was saying in Spanish:
> The original AHT that came preinstalled in the MacBook Pro (and maybe all other Macs) is found in disk #2.
> Originally I thought the AHT had a different partition on the HD but it ends up being an extension of the OS.
> This is not installed in OS X Lion, If you used the USB key or download it from the App Store, the AHT will not be included.
> So, to install it back in, you can either run the install from the DVD (just make sure you don't install iLife again and other files which you may not need)
OR
For Road Warriors
Since installing the bundled package will also install other Snow Leopard files; You might want to try this:
> Download Pacifist ( http://www.charlessoft.com/ )
> Drill down the CPUHelpFiles install package and only install the CPU_AHT package.
By the way, there is no way of undoing this, unless you want to reinstall Lion from the recovery partition.
> Restart your mac
> Everything should be A+ ok
> To test what you just installed restart the mac and hold down the "D" key before the screen turns white/gray. After a few seconds you should see the AHT loading screen:
Done! there is no need to have that DVD with you when you travel... -
Hi All. I have a very weird problem here, as I can't get the Apple Hardware Test to start on my late 2008, 2.66 MBP15 inch model# MC026LL/A (released early 2009 as a quiet upgrade from 2.53). Here's the story:
I opened up my machine as usual one morning, and the optical drive made a very weird noise I never heard before. So I decided to run the Apple Hardware Test (AHT) to see if anything was amiss. Well, I inserted the second install disk, held down the "d" key, and restarted the machine. It began to boot into the hardware test, but just after the AHT screen appears the computer just shut down. This happens every time I try to run the AHT.
I went to an Apple Store while I was on holiday in Brisbane (they don't have one here in Adelaide), and the genius said it was likely a bad optical drive. Well, I returned to Adelaide last week and had the local Apple Authorized store replace the optical drive. Tried to run AHT once again, and the same problem persists. So the original problem wasn't with the optical drive.
I thought maybe I accidentally used the startup disks for my wife's late 2008 15inch, 2.4, MBP (the one actually released in late 2008). I've looked around for the other sets of disks and can't find them. So here's what I'm asking help for: can someone who owns a 15inch MBP 2.66 15-inch (released in early 2009, model# MC026LL/A ) please tell me what the part # is for their set of install disks? It is written on the plastic sleeves of the install disks. And, could this person please tell which version of AHT is written on the disk itself? The set I have (which I think might be my wife's) has AHT version 3A158.
Might this be the problem, or should my computer still be able to run the hardware test using my wife's disks? I know they are both technically late-2008 15inch unibody MBPs, but I think my 2.66 (again, quietly updated and released in early 2009) might require a different AHT version, which would explain my inability to run the test. If not, what might be causing my computer to not run the AHT? I tried reinstalling OS X to no avail.
Thanks for all of your help!I think I share your skepticism--if your Mac was shipped with the later version of the OS, you should not have been able to do a clean install with discs of an earlier version. It looks like some machines originally shipped with OS X v. 10.5.5 and others with OS X v. 10.5.6. I don't remember just when 10.5.6 came out.
Your two machines are likely very similar in build, and maybe similar enough for the OS to install. It may be that the AHT is specifically designed for the hardware in each machine, and that would be a bit different.
As someone else said in another thread, there ought to be a tutorial on how to keep track of the original install discs since they are always getting lost. Maybe a secure note in the keychain or something like that.
Out of curiosity, does the AHT work on your wife's machine? If not, there could be a problem with the install disc itself, and if so, you might be able to get a free replacement under warranty.
Good luck! -
Apple Hardware Test error 4SNS/1/40000001:ID0R-0.000 on Retina MBP
Getting the above error on my 3-day old retina MBP with 16gb RAM and 768GB flash storage. I had loaded Chrome, Firefox, VMWare Fusion, Office 2011, and all the Apple updates as of 7/3/12.
My issue may be related to similar issues I've seen on these boards, relating to sleep or wakeup causing the intermittent crash. Machine has also crashed (kernel panic) 2 times. Genius Bar employee downplayed the AHT altogether, saying it's a false positive since his more advanced tool reported no errors. They then kept it for a day, to run a "loop test," which also came back with no errors. Then, because apparently it is easier to re-load the OS rather than actually diagnose the issue, they re-loaded my OS clean. (Yay, now I can re-load all my apps, copy 200GB data back on, and THEN we'll see that it is a hardware problem.)
Tomorrow I'll pick it up from Apple and run the AHT again. If it errors out again, I'm not sure what to do...One note I had neglected to mention is that the bar/band immediately above the keyboard gets very, very hot. Yes, I know that is where the fans are. However, all 12 of the MBP's at the Apple store did not have this extra-hot band, and those are on all day. My little Safari & Mail apps should not cause an overheat situation, on a functioning machine. Apple blamed Google Chrome for the crashes, downplayed the overheating, and downplayed the AHT results.
Update: I went to the Apple store today and took a look at the notebook. They ran their tests, had re-loaded the OS, and performed an undisclosed hardware repair. (They were helpful but vague as to what the actually did on the machine, hardware-wise.) They said their advanced tools & extended Loop Test did not indicate any errors or problems. While still at the store, I ran another quick test with the Apple Hardware Test, which came back with the same 4SNS error as mentioned above. I asked for a refund, which they approved (except they said I have to come back Monday since I bought the machine from Apple Business.)
When I got home, I ran an extended test with the Apple Hardware Test and got a *diffferent* error this time: 4HDD/11/40000000:SATA(0,0).
It's seems strange to me that the AHT shows 2 different errors, and yet the Genius' "advanced " tools find no errors. Thankfully, I will return this one (eventually) get a new unit. Thanks to everyone for helping. --Peter -
Can't perform Apple Hardware Test of any kind
I can't perform an Apple Hardware Test – on a late 2008 MBP – from original software disk, because my superdrive (matshita dvd-ram uj-868) has long been broke.
Whenever I insert any kind of disk, it doesn't even read neither the machine recongnizes it and it's really a **** of a bum to eject it (when lucky I manage to remove it with force-eject).
Anyway, these are the sollutions that Apple tells in order to perform the AHT
http://support.apple.com/kb/PH11342
If you have a new Mac (…) I don't
If your Mac has OS X v10.8.3 or earlier (…) I'm running OS X v10.8.4
If you updated your Mac to OS X v10.8.4 or later, use the system software disc or USB flash drive that came with your Mac. Well, obvious reasons…
So, what can I do?!
P.S.: I would like to run the Apple Hardware Test:
To know what happened to my SuperDrive.
For a long time it keeps with high temperatures (at least 70°C 158°F), causing the loud fans to pump up. Even with low %CPU usage (already have SMC fan control)
To have an overview of how is my machine doing.
Thank you!I've already tried and it didn't work because my MBP can't' be upgraded to OS X internet recovery (using option+D)…
http://support.apple.com/kb/HT4904 -
HT4904 Apple Hardware Test or not?
Tried to open Apple Hardware Test on my MBP Pro 13", but pressing the D-key while starting the MBP did not work.
Turned to "Computers that can be upgraded to use Lion Internet Recovery" where the latest MBP 13" is early 2011.*
My MBP 13" is late 2011 (recently upgraded to OSX 10.8.1).
What can I do to use the test?
*Download and install an updated EFI Firmware ROM for these computers to use the OS X Internet Recovery feature:
MacBook Pro (13-inch, Early 2011)Usermagic wrote:
Ok, I tried it but the disc is damaged and can not be read.
(Strange because the disc have never been used. I called Apple about this and they
said that they do not produce CD/DVDs anymore with AHT.)
Which number did you call?
You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.
If you're not in the US, you may need to go through the regional Apple Store that serves your location to find the contact number. Here's a list of links to all of those - http://store.apple.com/Catalog/US/Images/intlstoreroutingpage.html Another resource: International Support Phone #s. -
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?
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How to launch Apple Hardware Test from a USB optical drive?
Hi all!
First off, and before you guys starting proposing solutions I can't implement, I don't, repeat DON'T have a Firewire optical drive, nor am I going to buy one: I recently had to buy a USB LG optical drive to compensate for my SuperDrive going AWOL on me. I used said drive to reinstall OSX about a month ago, so this LG drive works just fine, thank you.
The thing is, I'd like to conduct an Apple Hardware Test, and I know you have to boot from OSX CD n°1 (in my case) to do that. Alas, since I can't boot from the CD in my SuperDrive by keeping the D key down, all I have is this LG thingy, and I wonder how I can conduct my hardware test with a USB optical drive.
I'll sum it up for you:
1) My SuperDrive isn't working, stopped working about the same time I installed this EFIng (guffaw, guffaw) Security Update 2009-001;
2) I don't have a Firewire optical drive;
3) All I have is a USB optical drive and MacOS X CDs.
4) Booting with the OSX CD in my USB optical drive and keeping D, C or alt keys didn't help.
I read in another forum that you could somehow copy the content of the OSX CD on a flash drive, then boot from the flash drive and conduct an AHT, but I'm not sure how it can be done.Hi!
Looks like we posted at exactly the same time, Glynn! LOL
Anyway, I did just what you said, drag'n'drop and all. The problem is, when I boot from the USB hard drive, it's exactly as if I were booting from the CD: first I'm asked to choose a language, then the install screen appears, and I can either reinstall on my startup disk from the USB hard drive (that's kinda cool, but I don't think I leave in on my USB hard drive, which can only content 40Gb, because I've almost 25Gb worth of data to retransfer soon...
So, in a nutshell, I couldn't find Apple Hardware Test anywhere. I even explored the CD content, but there are so many files...
What's my best option now? Could AppleJack help me here? Can I install AHT on my startup disk and boot on it using a special set of keys?
Almost time to go to work. A 5 minute walk, though...
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