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.

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Hello. Apple hardware test has detected an error. 4SNS/1/40000001:TN1D--1.000

Hello. Apple hardware test has detected an error. 4SNS/1/40000001:TN1D--1.000 Anyone knows what that means ? OS doesn't boot. Maybe it's hard disk error ?

It means your screwed if you're out of warranty.
That error translates to your northbridge temperature sensor is bad- BUT IN MAC "GENIUS" LAND, that means you either need a whole new logic board (a $700 part) or buy a new MacBook. On the non-unibody MacBook pros, you could have came to my store and spend $75 and had a working computer the same day- this is no longer possible on the unibody MacBooks.
WHY, WHY, WHY?
In a bold design move, Apple decided to SOLDER the thermal sensors to the logic board (along with many other components such as the video, graphics and IO), thus rendering these parts NON-SERVICEABLE by us independant technicians. Apple's reasoning is that they can "make their notebooks thinner", but why sacrifice performace for asthetics? Who cares, buy a new MacBook.
WHO NEEDS TEMPERATURE SENSORS?
It doesn't matter if your laptop is running hot or not, when a temperature sensor goes bad on a Mac, it shuts your computer down to prevent further damage. Apple was the first company to implement this "failsafe", now PC motherboard vendors are following suit after watching Apple's stock soar. What this means: Is that you could actually have a perfectly functioning MacBook except for one thing; the little guy who's sole purpose is to report whether it's not the computer is running hot or not has decided to not show up for work, so they closed up shop. If you ask me, it's the equivalent of a restaraunt closing on account of not having a dishwasher- but that's just the opinion of an ex-certified ACMT and what do I know- I'm not a "genius" or anything.

HT201257 mac os x 10.4.11 tiger: apple hardware test has detected an error (what does this mean): 4SNS/1/40000001:VDOR

Can someone help? I did an apple hardware test and it has detected an error: 4SNS/1/40000001:VDOR
What does that mean? Can i correct it myself? how?
my computer is "tiger" mac os x 10.4.11, Processor: 2.16 GHz Intel Core 2 Duo, Memory: 2.5 Go 667 MHz DDR2 SDRAM

Thank's for answering, realy appreciate your time,
A technician had installed last year "mac os x snow leopard 10.6" (family pack) at around $49.00 - I had originaly mac os x 10.4.11 (tiger). He had changed my hard drive, added memory: 2.5 Go 667 MHz DDR2 SDRAM, processor is: 2.16 GHz Intel Core 2 Duo (he told me he had to change my hard drive probably due to a power shortage. Before he did the changes, I had done a hardware test: it gave me the same error as today 4SNS/1/40000001:DVOR, He cleaned the inside, but he did not change any sensors. What am i to do???
Not too long ago i started having problems. (probably from a power shortage, at one point. I don't know if my external back up got corrupt. so i don't want to use it. He had eraced tiger 10.4.11 and installed snow leopard 10.6.
I eraced snow leopard and installed mac os x 10.4.11 (that came with my computer).
I wanted to install mac os x 10.6 (snow Leopard) without eracing tiger (chat sites say you can do that) but it said it couldn't use my hard disk because of my memory: my info says: used: 18,78 Go on the disk, available: 446.66 Go, Capacity: 465,44 Go
So that's when i did a hardware test with the CD1 of mac os x 10.4 (tiger) and that where i got the message.
If i have a sensor problem, then i guess i'm waisting my time trying to reinstall mac os x 10.6 (snow Leopard) or am i doing it wrong. I was told i could leave tiger there and upgrade directly to snow leopard, without installing mac os x 10.5 (leopard).
Thank again

Apple Hardware Test Problem Detected

I did an Apple Hardware Test, (where you restart your computer while holding down D and Apple detects if you have an problems on your computer). And I was notified that I had this problem: "4SNS/1/40000001:1DOR-0.000" What does this mean? How do I fix this problem?

Help here > Mac notebooks: Apple Hardware Test may report SNS alert when power adapter is not connected

Hardware test turns up RAM error

I get this error when running the hardware test:
2MEM/103/4: SODIMM1/J25UPPER
What does this mean?
This is the first time I've run hardware test since I've had the computer (June 2005) and I've had this memory the entire time, but haven't had problems. The reason I ran this hardware test was because I was having trouble with my wireless connection, so I ran it to see if anything was up. Thanks for your help.

It says either the upper RAM slot RAM board, or the upper RAM slot is in need of replacing. See this replacement program to see if you qualify:
http://docs.info.apple.com/article.html?artnum=303173
If you are getting four language you must restart your computer errors, those could be indicative of your having the problem too, or if you are forced to restart the machine from the power button instead of force quit applications by command-option-escape.
If you are out of AppleCare and replacing your RAM in warranty does not solve the problem, you may need to go to a notebook repair center to see how much they charge different from Apple:
http://www.dttservice.com/
http://www.powerbookresq.com/
http://www.microdocusa.com/
http://www.macspecialist.com/
http://www.techrestore.com/
And follow my backup FAQ before sending it in for repair:
http://www.macmaps.com/backup.html

Apple Hardware Test detected an error code... now what?

I ran AHT and I got this message:
Alert! Apple Hardware Test has detected an error
4M0T/1/40000003:HDD-1424
Can anyone shed some light on this?
My early 2008 iMac has been having issues with the spinning wheel when opening and using applications. I can't seem to pinpoint when it happens, but many times I will have to shut down or power the machine off to stop the wheel of death from spinning.
Any help would be greatly appreciated.

bump... any one else?
I was able to boot the machine up today and I am noticing the top of the machine is getting very hot. Could this be the overheating issue I have read about here in discussions?
I was also able to transfer files to an old eMac, so I am backed up, but that transfer slowed after the machine warmed up. I would shut the iMac down and let it cool... it then transfered great while cool but slowed when it heated up....
I am taking it in to a local authorized repair shop Monday morning..... just hoping for some more thoughts before then.
Thanks!

Ran Apple Hardware Test from USB Install Drive on new MBA, Got this error

Last week I got the fully loaded 2010 MBA 13" (2.13ghz/4gb/256gb).
It's just perfect, I have no problems with it.
On a whim, I ran the quick Apple Hardware Test using the included USB install drive (took just a few minutes) and it came up with this:
Alert! Apple Hardware Test has detected an error.
4SNS/1/40000001:IDOR-0.040
Screenshot:
http://img811.imageshack.us/img811/9800/2010macbookairhardwaret.jpg
Any ideas on what that means? Hopefully it's a false positive. I'm running the extended test right now, which will take more than an hour. Will report back.
Anyone seeing anything from the hardware test?

jonm8 wrote:
Last week I got the fully loaded 2010 MBA 13" (2.13ghz/4gb/256gb).
It's just perfect, I have no problems with it.
On a whim, I ran the quick Apple Hardware Test using the included USB install drive (took just a few minutes) and it came up with this:
Alert! Apple Hardware Test has detected an error.
4SNS/1/40000001:IDOR-0.040
Screenshot:
http://img811.imageshack.us/img811/9800/2010macbookairhardwaret.jpg
Any ideas on what that means? Hopefully it's a false positive. I'm running the extended test right now, which will take more than an hour. Will report back.
Anyone seeing anything from the hardware test?
I think this will solve your issue:
http://support.apple.com/kb/TS3578?viewlocale=en_US

Apple Hardware Test Error Code " 2STH/1/2:CPU A AD7417AD1 "

Hi All,
I have a G5 2.5 GHz dual processer that seems to work fine after 14 months. But when I run the Apple Hardware Test, I get the error message listed in my subject above. I talked to Apple and took the machine in for service. Servicer said get the latest upgrade of the AHD and try it instead of one that came with my machine. After some work (a good bit), I got Apple to send me the upgrade and when I run it, I still get the same error code! Does anyone have any suggestions? I could sure use them. Thanks,
Chuck
Powermac G5 Mac OS X (10.3.9)
Powermac G5 Mac OS X (10.3.9)
Powermac G5 Mac OS X (10.3.9)
Powermac G5 Mac OS X (10.3.9)

Although you do not have any symptoms(?) the same error was cause for concern here
http://discussions.apple.com/thread.jspa?messageID=598444&#598444

Apple hardware test error 4SNS/1/40000000: TB1T-128.000

I have just bought a used Macbook unibody 2.4, 6GB DDR3, 500GB 7200
And did a apple hardware test which showed the error "4SNS/1/40000000: TB1T-128.000"
What might it mean and how serious it might be?
I tried to google it and found out but not successfully.
Could anyone help with it?
Thank you.

It's a sensor error. We have no access to the "translation" of hardware test diagnostic messages. You'll need to take the computer to an Apple service center.

Con apple hardware test rilevo questo errore nella memoria 2MEM/1/4 DIMM1/J4001/1/ e qualche altra volta 2MEM/104/4 DIMM1/J4001 ritengo siano problemi ad una delle memorie ram aggiuntive. che debbo fare ? è da sostituire? o c'è un modo di escludere l

con apple hardware test nel mio IMAC G5, rilevo questo errore nella memoria 2MEM/1/4 DIMM1/J4001/1/ e qualche altra volta 2MEM/104/4 DIMM1/J4001 ritengo siano problemi ad una delle memorie ram aggiuntive. che debbo fare ? è da sostituire? o c'è un modo di escludere il o i banchi di memoria interessati?

Apple hardware test detected an error.

Well, I'm back (see older post) . Just ran Apple hardware test and it says it detected an error. What should I do from here??
I using the original Tiger discs which came with the computer. The Leopard disk was just a drop-in CPU disc they gave me to upgrade from (when I purchased the iMac in 07). Can I just use the Tiger disc again to run Disk Utility and try to fix the HD?
Nancy

Attempted to repair disk via the Disk Utility on the Tiger disc.
Now receive new messages:
under Verify & Repair Macintosh HD:
Error: The underlying task reported failure on exit.
uner 1 non HFS volume checked:
1 volume could not be repaired because of an error.
I think I'm toast. Can anyone tell me what to do at this point?
Thanks,
Nany

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

Error Codes after Apple Hardware Test...

After someone here told me I've been experiencing kernel panics, I did some digging on the x lab site and re-ran the Apple hardware test in loop mode. after 17 runs, it returned the error:
4MOT/2/40000005:Right Side
I can't seem to find a list of error codes anywhere. My MBP has two 1GB RAM chips, both were pre-installed when I got the machine from Apple. I haven't tried switching them to see if the same error is returned on testing or with ONLY one or the other installed to see if this is truly a RAM issue. I thought I'd post to the forum for ideas first...

I'm afraid I have no idea. If you have AppleCare, I would ask them about the error code. You do have a different error code (/2/ not /1/ and different number after the second slash) than the link, so perhaps it is not a fan motor that is your problem, though I'm hard-pressed to think of what other motors the MBP has (I don't think the hard drive is on the right side, for one.) Alternatively I can imagine, since you said it took you 17 tests to get the result, that this is an intermitent problem--for all I know, just a slightly loose/poorly soldered wire--and so istat hasn't detected the problem yet.
I think AppleCare or a Mac Genius is your best bet, if you have the one or can get to the other. In particular, unfortunately, Apple does not seem to publish the hardware error codes; it only makes them available to techs.
Good luck!

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

What do Apple Hardware Test Error Codes indicate?

I recently installed new 1GB memory modules in both slots. When running the Apple Hardware Test, I got the following error code:
post/0/2048 S0DIMM0/J20STANDARD
Does anybody knows what this means? Up in the Test Results Box, it said Memory passed.
Do I have a problem or not?

I've had little luck finding a compilation of those AHT codes and their meaning. In your case, "post" is probably "power-on self test," the routine that all Macs run at startup to check for problems.
2048 is the total RAM qty in MB.
J20STANDARD is the logical name of one of the RAM slots.
Run System Profiler and see what it shows for when you select "Memory" from the left-hand pane. On my 1Ghz 17" PowerBook, Profiler shows one slot as J20STANDARD and the other as J23REVERSED and it runs fine. Profiler will tell you if the modules are matched for speed and CAS latency.

Will Apple Hardware Test definitely detect RAM errors?

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