Imac hardware test frozen

late 2012 27 inch imac has had a couple of startup issues, freezing at login screen or showing pixelated screen. hardware test has also frozen at checking memory phase. any others experiencing this?

Those who are experiencing it have a hardware fault. Take the machine in for warranty service.

Similar Messages

  • I want to run apple Hardware Test but can't find it on any CD's.  I bought my iMac in 2009.  I think it had 10.4 installed.  It's not on my installation disk.  Where can I find it?

    I want to run Apple Hardware Text but can't find it on any CD's.  I bought my iMac in 2009.  It came with 10.4.  Apple Hardware Test is not on the installation disk.  Should I have it?  Where can I find it?  I"m now running 10.7.4.

    The disc plainly state:
    To  use the AHT, hold down the D key as the computer starts up.
    Works here. However, there was an issue with installing Lion that screwed this process up.
    Mount disc 2, run this command in the Terminal app, OPTION-click & hold Finder's Dock icon, and select RELAUNCH:
    defaults write com.apple.finder AppleShowAllFiles 1
    That unhides all hidden files/folders.
    Now, drill down to /"Applications Install\ Disc"/System/Library/CoreServices/ and drag the .diagnostics folder into your Lion boot volume's /System/Library/CoreServices/ folder. That might require you to authenticate to copy the folder into the CoreServices subfolder.
    Run this command to hide the normally hidden files/folders and RELAUNCH the Finder again.
    defaults write com.apple.finder AppleShowAllFiles 0
    This should allow the machine to boot into AHT when restarting and holding down the D key.
    If that doesn't do the trick, run this command in the Terminal app:
    sudo chown -R root:wheel /System/Library/CoreServices/.diagnostics
    At the Password: prompt, carefully type in your admin password, since nothing shows up on the screen, and hit the return key. Then, try another restart, holding down the D key.

  • HT201257 hardware test using an external optic device (iMac) on macbook pro 9 years old via firewire. What to do? and how to do it?

    hardware test using an external optical device (iMac) on macbook pro 9 years old via firewire. What to do? and how to do it?
    I thiunk the graphic card is defective and need to run hwt

    You don't.
    Need a internal optical drive and the Hardware Test on disks is old and outdated anyway.
    Your machine has lasted a long time, congratulations, they usually only last about 4-5 years.
    They get clogged up with dust and overheat, kills the video card, there is nothing you can do as it's hardware damage over time.

  • Blue screen of death with HDD Hardware Test error on iMac HELP!!

    My iMac is not starting up.  It just get the blue screen of death during startup.  It is a 2.66 mghz duo with 2gb 800 ram.  I was able to get the Hardware test to run and got an error of 4M0T/2/40000004: HDD-1560.  I am assuming it is an error with the internal hard drive since I have nothing else hooked up to the mac other than the keyboard and mouse right now.  Does this code mean my hard drive is completely shot?  Any help would be appreciated.

    4M0T/2/40000004: HDD-1560.  
    Either failing or failed   
    You can have Apple replace the drive at a nearby Apple store or an Apple certified repair shop.
    Apple - Support - Check Your Service and Support Coverage

  • I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red-keys out of order, and --Volume corrupt, can't be repaired.  I tried

    I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red…keys out of order, and ……Volume corrupt, can't be repaired.
    I tried to do a system install, but message said…disk can't be changed. Will a complete erase and install fix this ?
    Everything is backed-up.

    There's hardware and software.
    Your drive could physically be in good condition but something has caused the file structure to be messed up (it just happens sometimes).  The directory that keep track of files is corrupt.  Disk Utility can help determine if that is the issue.  In some cases it can repair the problem but it cannot do it to a drive that is being used to boot the system while you are doing that.  You have to boot from another drive.  Some things DU cannot repair and you need to try a stronger utility such as Diskwarrior.
    A failing hard drive (one with mechanical issues) can be a cause of file structure issues but this is by no means always the case.  Apart from looking at the SMART diagnosis feature of Disk Utility (and smart isn't totally reliable) there often isn't a way to tell if a drive is failing until it suddenly happens, which is why you need to maintain backups.
    In your situation it does sound serious and not just minor directory corruption.  You can try erasing (formatting) the drive,  You may need to do this if it is really corrupt, in which case there could be underlying physical issues.  I use old technology but if you have the patience you can try erasing the drive with the security option of writing zeros once (don't do more unless you are going on a 3 week vacation).  This makes the drive not simply assume everything is okay by forcing it try every part of the drive by writing data.  If something is gong wrong you may find it marks a lot of bad sectors, or flat out refuses to format.  Then you know you need a new drive.

  • My 2006 iMac running Snow Leopard won't boot even after erasing and re-installing Snow Leopard (via my MacBookPro), either from the HD or DVD drive.  Can't get it to run Hardware Test.  Disk Utility says disk OK - files are there. What can I do?

    My 2006 iMac running Snow Leopard won't boot even after erasing and re-installing Snow Leopard.   I erased and re-installed by putting the iMac in Target Disk mode and usin my MacBookPro as the host.  But after numerous attempts I still can't get it to boot either from the HD or DVD drive. I just get the white screen after the wheel stops spinning.  I can't get it to run Hardware Test - just get the white screen.  If I use Disk Utility via my MBP it says the disk appears OK. All the Snow Leopad files appear to have been installed. What can I do?

    Hi-NRG Bwoy wrote:
    I erased and re-installed by putting the iMac in Target Disk mode and using my MacBookPro as the host.
    Reet the SMC and the PRAM
     Cheat sheet to help diagnose and fix your Mac
    Perhaps you installed the wrong version OS X onto the iMac, you can't use the disk from another Mac.
    clean the disk.
    If it's not working then use this method to create a bootable 10.6 USB from the iMac machine specific 10.6 disk or the 10.6.3 retail disk on your other Mac, use it to boot the iMac with.
    http://www.maciverse.com/install-os-x-snow-leopard-from-usb-flash-drive.html
    How to erase and install Snow Leopard 10.6

  • 24 imac screen freeze hard drive reinstall&hardware test ok

    24 imac screen freeze hard drive reinstall&hardware test ok

    Do you have a question? If so please ask it and provide more information. If English is not your native language please use Google Translate .

  • 24" iMac summer 2008. CPU fan runs at highest speed, some times goes to "sleep" mode. t' is about 35'- 42'C. Run hardware test: 4sns/1/40000000:tlop-130.000, next time 4sns/1/40000000:tlop-128.000 errors. Reinstalled all softwere. Nothing changed.

    24" iMac summer 2008. CPU fan runs at highest speed, some times goes to "sleep" mode. CPU t' is about 35'- 42'C. Run hardware test: 4sns/1/40000000:tlop-130.000, next time 4sns/1/40000000:tlop-128.000 errors. Tried SMC, NVRAM, PRAM. Reinstalled all softwere. Nothing changed.

    I suspect you have hardware problem with a fan sensor. Doing a software install will not help the machine needs to be taken in for service. If you run Apple Hardware Test in Extended Mode it should reveal the error code. If it does not then run AHT an additional 2-3 times to be sure in Extended Mode. Each pass will take about 30-60 minutes.

  • HT4904 imac 24-inch, Early 2009 can use hardware test over the net?

    My imac keeps freezing on me over the more trivial things like youtubing or running apps I got for my toddler son. It's frustrating and I don't know if my hardware si to blame.
    Can I run hardware test ove rthe web since I'm using mountain lion now?
    Also It seems like this is already addressed but the fix doesn't fix it because al alredy have it installed:
    About iMac EFI Firmware Update 1.4
    This update fixes intermittent system freeze issues for iMac computers with ATI Radeon HD 4850 graphics and fixes wake-from-sleep issues in Boot Camp.

    Also I want to point that they had this problem before : https://discussions.apple.com/thread/1978213?tstart=0
    It was fixed with the new firmware but since I updated to Lion the problem started for me. Does you knwo if they eill release a new firmware update that takes care of the problem now?

  • 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

  • What version on Apple Hardware Test (AHT) does my iMac support?

    When I start up my iMac holding the "D" key, it gives me this message: "Apple Service Diagnostic does not support this machine (iMac8,1/Mac-F226BEC8)"
    I'm guessing the shop I took it to last year who reinstalled Snow Leopard used the wrong disc or something??? Anyhow, I need to find the disk with my correct version of ASD. My iMac is an A1224 EMC 2133. Thank you.

    Look here:
    http://support.apple.com/kb/TS4154
    EDIT:
    Ooops! That refers to Lion!
    The hardware test for Snow Leopard is on Disk 2 of your original install disks.
    http://support.apple.com/kb/HT1509
    Message was edited by: Klaus1

  • How do you start the hardware test on an imac with bluetooth keyboard

    How do you start the apple hardware test on an imac with a bluetooth keyboard as the instructions is to press the D key whilst restarting? And of course the imac cant see the keyboard whilst booting up as the bluetooth connection has yet to be established

    Have you tried following the directions for running it from the DVD? The instructions are on the Hardware Test link.If you are correct and it cannot due to the wireless keyboard not making a connection you will need to borrow a wired USB keyboard.  

  • I can not perform hardware test on 2011 imac with mavericks

    I unplug all devices from my iMac and held the d key and still can not get to the hardware test. The Mac store was able to perform it with a wired mouse even after I added more ram therefore I know it can be performed. Am I leaving something out?

    Read the instructions in Using Apple Hardware Test.
    If your iMac shipped with discs, you must run AHT while holding the d key while starting the Mac with its grey Applications Install DVD inserted in the optical drive.
    To force the Internet version of AHT to load: with two fingers hold option d while starting your iMac with a third finger.

  • Running Hardware Test or Running Mac OS X from DVD with an older iMac

    I have a 4 year old iMac which is running Snow Leopard 10.6.2 and using a wired aluminum keyboard along with a Magic Mouse. I recently had some files corrupted so that when I booted up, the dock would not load and could not run any programs. It appeared to me that Finder wasn't working properly.
    In any event, I tried to run the Apple Hardware Test from the Snow Leopard DVD by starting the computer and pressing the D key but the computer would not boot off the DVD and continued booting off the hard drive.
    I also tried starting the computer with the C key to try and do a reinstall of OS X, again with same result.
    I ended up bringing the computer to Genius Bar at local Apple Store. The tech guy plugged an older styled white plastic keyboard and the computer recognized the D and C keys during start up. He then did a recovery of OS with no problems.
    He downloaded a firmware update for me to install when I got home. When I tried to install the update, updater said firmware update is not needed.
    At the moment, I'm in the same position as before. The computer runs fine but I still can not boot off the DVD because the aluminum keyboard's keys are recognized at startup.
    Any ideas on firmware update to rectify this? Don't have the older plastic keyboard and seems silly to have an old one on hand in case computer acts up.

    I tried resetting the PRAM but since keyboard keys are not recognized on booting up, holding the CONTROL, COMMAND, P & R keys didn't work. I noticed that on older Power PC Macs that holding Power On button continuously while starting up would force computer into Open Firmware so PRAM could be reset. This didn't work for me.
    I also reset the SMC.
    When I look in Utilities, I see that Aluminum Keyboard Firmware Update 1.0 is installed last modified on Oct. 8, 2009. I've had the keyboard much longer than that so not sure what that means. When I clicked it, it said firmware is up to date.
    In any event, is there any way to force a firmware update even if my computer says the firmware is up to date? Thanks

  • Trouble running hardware test on 07 iMac with noisy fan

    Hello
    I have an 07 iMac with a noisy fan- I've tried vacuuming out dust from the back but want to avoid taking it apart if possible...
    I read online I should run the hardware test, but since I am running Mavericks the Apple support advice is to run the original OS X install disc and restart (holding down D or Option+D)...
    Long story short I got a replacement disc from Apple (I'd lost the original) but the iMac ejects it when I restart following the process above... could it be my bluetooth keyboard? Hopefully not since I no longer have the original hardwired one... or does anyone have any other ideas for either how to get to the hardware test... or fix the fan (without a third party app just stopping it)
    Thanks!

    Try holding down the Option key to get the one time boot manager screen then select the AHT. Not sure as Apple moved it around on different install discs but it might be on the Applications discs and not the OS X discs.

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