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

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VRAM failed Tech Tool deluxe and Apple hardware test

My G5 (isight) keeps 'freezing' so I ran the Tech Tool and Apple hardware test and they both say that my VRAM 'failed'.
The hardware test gave an error code2ATI/I/4: 113-xxxxx-113
How big is this to fix? I've started up from the install disk and the disc utility said the Hard Drive was fine. ny suggestions would be really useful.
Thanks
Andrew

Andrew, I would suggest you call Apple back and tell them that things are not ok, if you erased the drive, it should have repaired any bad sectors, something is not right. If you have Apple Care (I hope you do), insist that someone test your machine. Be sure to make a full backup before you take it in, I use SuperDuper!.
Good luck and please post back,

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.

What is the difference between Apple Diagnostic test and Apple hardware test?

I've just been wondering if one is better than the other? My mac shipped with apple hardware test, and I'm curious if the newer Apple Diagnostics is better

Apple Diagnostics is better, but no Mac model can use both it and the Apple Hardware Test.
(122151)

Kernel Panics, Sudden Logout and Apple Hardware Test

Hello,
I have been experiencing Kernel Panics and Sudden logouts twice a week. I thought it was strange, because my boss just bought me the MacMini with 8gb RAM preinstalled.
I want to solve the problem, but I don't want to send my machine to support in vain.(because the MacMini is actually owned by the institution I work in, and those things take time).
So I ran some diagnoses I heard about on the internet, but I don't know what they mean, or what I should do with it.
I made two kind of diagnoses:
I tried to run Quick Apple Hardware Test.
I tried to run Mac version of memtest in single-user mode.
I made both diagnoses with each memory separatedly, in every slot combination possible, and both memories together.
Everytime I tested both memories together, AHT froze while testing memory, and memtest resulted in failures.
Everytime I tested a memory module separatedly, memtest and AHT gave no errors.
Is there any explanation for my Mac Mini not like my both memory modules together?
I updated OS X to 10.7.3 with combo update, and FileVault(don't know it makes any difference).
I made all tests with no peripherals other than a DVI monitor on HDMI out, a Magic Mouse, and a Apple (wired) Keyboard.
What should I do?
Should I send it to support and spend my next month without a machine?

If you're able to boot, launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Console in the page that opens.
Select the most recent panic log under System Diagnostic Reports. Post the contents — the text, please, not a screenshot. For privacy’s sake, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post "shutdownStall" or "hang" reports.
If you can't boot in the usual way, try a safe boot. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Safe mode is slower than normal, and some things won’t work at all.

Running Apple Hardware Test... without ability to see the screen

Here's a nice conundrum- my screen isn't working. I want to run Apple Hardware Test, but since I can't see it... no dice.
I'm pretty sure this is the NVidia 8600GT problem- Apple has acknowledged that these graphics cards are defective. http://support.apple.com/kb/TS2377
The only way I can get into the computer is to use screen share- I've tried an external monitor, and it doesn't work. And I can't screen share when the apple hardware test is running- any idea how to see this? Another option- is there anyway I could start it without seeing anything, and then look at the results later? Are the results saved in Console or anywhere?
Thanks1

I dont think you need to do a hardware test.
Its the 8600 video cards, thats why Apple extended the warranty on the cards. Just bring it to the Genius Bar and they will sort it out for you.

MacBook Air Late 2010 and Apple Hardware Test

I just bought a second hand MacBook Air Late 2010, 13 inches, 2.13 Core 2Duo. Everything works great, system re-installed after erasing the HD ( Mountain Lion) Internet recovery works great, all is ok.
The only thing that I can't work out how to get is AHT. I tried holding down D at the start but nothing. Holdind down D and Alt takes me to the Internet Recovery harware test, but when I try to run it, it comes out that the machine is not supported. I read that to be able to use it, I needed to dowload a firmware update. And so I did. But when I tried to install it it came out that it was not going to work on my system ( bare in mind that I can access and use Internet Recovery)
What Am I doing wrong?
I'm not too bothered about being able to use AHT at the moment, but there will be time when I will need to.
All the help will be appreciated.

It has to be available. It is the only way to restore that system back to as shipped from factory specs and reinstall the ilife apps. In your situation since you have another mac and a valid license for mountain lion and you have a air of a newer model year that can use the internet recovery system you were able to install a version of os x. But if you didn't have a license and that air was just one revision prior to that model year you would be stuck with a computer and no working os on it or no valid os on it.
Basically when anyone is selling an mac computer that computer should be wiped and the original os x version reinstalled. To do that on system older then late 2011, or some of the early 2011 models, you need the original apple supplied reinstall media. Whether that is dvds or a usb thumb drive. Otherwise the seller is selling pirated software and the buyer has no way of updating or upgrading that mac computer.

Apple Hardware Test Error: 4SNS/1/40000001: IDOR-0.958 what's wrong?

Hello
i swapped SSD in MBA A1369 to an OWC 256GB, it worked well since 2 months until yesterday.
When I opened screen to wake up, it showed only blinking folder with question mark so it couldn't find startup volume.
SSD is invisible in Disk utilities and Apple Hardware Test shows: 4SNS/1/40000001: IDOR-0.958.
I don't know what this error means, is it any way to repair it on my own?
If not, memory seller will exchange item, but I'm asking you guys, before shipping.
Thanks in advance

Ask and ye shall receive reilogix...
https://discussions.apple.com/message/18961331#18961331
Your machine is absolutely fine. Run the test again with your power connected.

Cant run apple hardware test

I have a G5 20" iMac, intel based. I've been trying to perform a Apple Hardware test but am unable to get it started.
Any help?

Thanks. Yes, I have a late 2007 20" imac. The model I have is a 2 GHz Intel Core 2 Duo, with 2 GB 667 MHz DDR2 SDRAM of Memory. I have a 320 GB Hard drive. The disks that came with the computer when I bought it in 2009 from Apple (3 of them) say iMac G5. I have 2 G5 Mac OS X install disks and a G5 Add'l Software and Apple Hardware Test Disk.
My problem started a couple of weeks ago when I would be getting the spining rainbow beach ball. I've opened Utility Disk and have Repaired Disk Permissions.
When I tuen on my computer I follow the instructions to the letter (from the link you gave me, I already had that and have tried it a few times) and it still will not start the test.
Each time I try it, I get the grey progress bar underneath the Apple Logo and spinning grey gear. The progress bar goes about a third of the way and ends then, the blue screen appears and my login window appears.
I have tried to run the Hardware Test by booting from the Install Disk, and from the Hardware Test Disk as well and the same this happens.
No matter what I do I can't seem to get the test to start, nor, start my computer without this Grey Progress bar underneath the Apple Logo and spinning gear.
I susspect I need additional Ram installed, but do not know how to check my computer to find out.
Lastly, the computer will only work for about 5 - 15 minutes normally after logging on. After this time the rainbow beach ball comes back and even the simplest of task can't be performed with a wait for the beach ball to stop and go away...
I'm stuck and don't know how to proceed...
I have $0 money left to invest in a certified Apple technician to come to the house to fix the problem...
Help....
Thanks,
Brian

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.

Can Apple Hardware Test disk work when a hard drive has no OS installed yet

I removed a bad original hard drive from a PowerBook G4 12" aluminum notebook. It made clicking sounds as it ran, and would not boot. I replaced it with a 320GB Western Digital HD. I also upgraded the original 512KB memory with 1GB.
Before removing the bad hard drive, I was able to boot just beyond the language selection dialog from a full installation CD (Mac OS X v10.2) while holding the "C" key during power on, but could not install it, of course, on the bad hard drive.
Now with new hard drive replacement in the PowerBook (formatted via fire wire from a MacBook Pro running Snow Leopard) and the upgraded memory, I ran a Disk Utility check via fire wire and found the new hard drive in the PowerBook to be in good working order and ready for an OS installation. However I can no longer boot the PowerBook G4 with the full installation CD in the customary manner, getting instead the flashing question mark over the finder folder icon.
I decided to see if there might be some other problem by using a PowerBook G4 Apple Hardware Test disk. Upon booting from the test disk, I get a message that declares the disk will not work with the PowerBook G4 machine.
What's up?
Message was edited by: techtoots

There's more to my original question than whats on the face of it. Please read more about this below. However, I will still wish to know if an AHT, say an original one if that's important, will do it's thing when no OS is installed.
Pretty sure that I'm NOT using either disk or sets of disks that came with this G4 PB. Included among what I do have are 6 grey disks:
__PB G4 Software Restore 1
__PB G4 Software Restore 2
__PB G4 Software Restore 3
__PB G4 Mac OS 9 Install v9.2.2
__PB G4 Mac OS X Install v10.1.4
__PB G4 Applications
And 2 Jaguar full install DVDs:
__Mac OS X v10.2 Install Disc 1
__Mac OS X v10.2 Install Disc 2
I was hoping to be able to find something useful among these disks - if not in a strait forward manner, them by some manner of hacking.
I know how to use my MacBook Pro create a disk image that will house any number of these DVDs. My thought is to create something that can be cloned to the PB G4 via fire wire. I just need to be sure how to daisy chain multiple DVDs in terminal mode, if more than one DVD is required in the cloning process.
I have placed an order for Leopard 10.5 - full installation DVD direct from Apple.
Once received, I will have 14 days to return it unopened. So, I want to be sure this PB G4 is operable before I break the seal on the Leopard package.
Therefore it's not so important that I clone everything from the original installation - just enough to see that the PB G4 boots and runs in Finder. If I can achieve that much, I will advance with Leopard 10.5 when it arrives.
My *PROCESSOR SPEED* is 1.33GHz
Other original specs:
L2 Cache 512 KB
Memory 512 MB
Bus Speed 167 MHz
Boot ROMV 4.8.3f1
Memory Slot 256 MB DDR-SDRAM

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.

Can't boot off Apple Hardware Test disk

Can anyone suggest why my laptop won't boot off of its Apple Hardware Test disk anymore? I have not tried it in years, but want to try now. I have the original, and a copy I made years ago, and neither will boot. I can select them at startup disks in that preference pane in OSX, but then it fails to find it, and boots into OSX. I can boot into OS9 on the hard drive. I was able to partially boot off of a different AHT disk from my 12" Albook G4, but it gave the message that I can't use that disk since it is not meant for the Tibook. One idea is that TechTool tells me that "macintosh startup file was absent", and the Help file states:
"The Startup file is intended for use by systems that do not have built-in ROM support for booting from HFS Extended volumes. The first eight extents of the Startup File are stored in the Volume Header. This makes them easy to locate and read into memory. This file contains information used by the computer’s ROM to determine what program will boot the computer. In almost every case, this will be configured to point to the preferred System."
But it does not tell me how to restore this Startup file.
-how can i get my startup file back?
-my computer boots fine off the hard drive, so is this file used only to boot off a CD?
-any ideas why i can't boot off my AHT CD?

Hi, t. (That alias of yours sure is a mouthful.) I think in your shoes I would pose the question to the tech support people at Micromat (TechTool's developer). It's their error message, after all, and they should be able to explain it to you in as much detail as you need. Perhaps they'll shed some light on the original problem in the process.

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.

I have a partition on my IMac disk and Windows 7 loaded on one partition. I tried to open and W7 will not open and cannot repair itself. Is there a diagnostic/disk repair from Apple that I can try before reloading W7?

I have a partition on my IMac disk and Windows 7 loaded on one partition. I tried to open and W7 will not open and cannot repair itself. Is there a diagnostic/disk repair from Apple that I can try before reloading W7?

Csound1 What Ive been trying to explain is that I have been running bootcamp, I open the app where the first screen is the introduction, i hit continue, the first time I select "download the latest windows support software fromm Apple" then I return and instead select "Install Windows 7." Then hit continue. The third screen is where I "Create a Partition for Windows" I set Windows to 80 gigs then hit INSTALL. As stated before Bootcamp cannot find the install drivers saying "The installer disc could not be found." My windows software is on a USB drive not a disc, I tried using a virtual disc reader to make it appear that the windows software was running on a disc, still no luck. What I would like to know is how to install windows on bootcamp.

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

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