G5 Full Speed Fans/ The Apple Hardware Tests Error Code

Since yesterday My DP1.8 G5's fans are max speed like jet engine. I tried PMU resets , Disk warrior. But nothing helps. The Apple Hardware Test gave me error code of "post/192/0" . Do you guys know what does this error code mean?
Thank you.

Hi-
Welcome to Discussions!
I think thast the error is related to the "Power On Self Test", or POST. When you start the machine, are there any beeps, or power button LED flashes? If there is a POST error at startup, the power LED would flash in cadence with the beeps..
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
Do you have any new RAM installed?

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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.

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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:
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Does anybody knows what this means? Up in the Test Results Box, it said Memory passed.
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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.

What does Apple Hardware Test error code 4MEM/1/40000000:OX3bb6b190 mean?

Mozilla kept crashing so I did the Apple Hardware Test and got error code 4MEM/1/40000000:OX3bb6b190. I reinstalled MacOs 10.4.4 (after saving the important stuff to disk of course) and it took about 10 tries to get the 2 disks installed. After the installation, I tried to update to 10.4.5, and when I restarted, the screen was blank. The only disk the computer will start with now is the No. 1 installation disk. What can I do?

Hi
A MEM error code generally indicates a faulty RAM Module. In my experience most RAM manufacturers offer at least a 5 year warranty of their RAM products. Some warranties are for 10 years. Sometimes reseating (taking it out and putting it back in again - properly) the Module will 'cure' the problem. Run AHT afterwards if you try this option first.
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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,
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Powermac G5 Mac OS X (10.3.9)
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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 Code

Hi,
I've recently tested my machine using the Apple Hardware Test, and received the following error code:
4MHD/2/4000 0004: 0x3ca74c90
Has anyone perhaps encountered this same code before perhaps & could they perhaps shed some more light on it?
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When your data backup is finished, call AppleCare and ask the question. You may need to get the machine repaired.

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The fan on my 13" Macbook Pro recently started running continously. I tried resseting the SMC per directions on the apple support page, when that didnt work I ran the Apple Hardware Test from my install cd, and got the following error: 4SNS/1/4000000 : TNOD-128.000
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Hi Alex FLB, welcome to Apple Discussions!
I had this exact error code (4SNS/1/4000000) on my iMac a couple months ago, along with the same symptoms. The code refers to one or more faulty temperature sensors on the logic board of the unit. Because the MBP isn't getting a reading from a temperature sensor, it has no idea what the actual temperature of the computer is, so it runs the fans at high speed in a fail-safe mode to prevent damage.
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Same error information here.
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This indicates problem with HD fan.
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Best.

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To start up your computer in Apple Hardware Test:
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HT1310- Startup Manager: How to select a startup volume

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i received the applecare training program for my birthday and while exploring the applecare service source website i found a image file of the apple hardware test (AHT) for each model along with a pdf of the service manual and a pdf of the AHT service codes. The problem i'm having is, i cant open the image of the AHT.

After downloading that image, open it and it will show up mounted in your desktop. Then, open Disk Utility (in /Applications/Utilities), right-click your Apple Hardware Test image in the sidebar and burn it to a DVD. Finally, start your computer from the disc, holding the C key, so Apple Hardware Test should start, always that you have the correct version for your computer.
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You can only run the Apple Hardware Test from the correct Disc that came with your system. see > Intel-based Macs: Using Apple Hardware Test
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How can i get or download the apple hardware test for a macbook pro made in 2012 running Mavericks 10.9.3

Does anyone know how can i get or download the apple hardware test for a macbook pro made in 2012 running Mavericks 10.9.3. Thanks.

Sean and Andy -
I have to agree with Andy here. I am having the same problem on a mid 2010 MBP (6,2). I have already read the AHT info provided by Sean's link, and they are less than helpful. I'm sure they will be helpful to those who find that they work, but they are confusing if this is not the case. For example, my MBP(6,2) came with ONE (not two) installation disks, so the instructions don't work for me. Another issue is the instructions confound the descriptions related to the MBP, the original (delivered) software (OS X version), and the current installed OS X upgrade software.
So here's what does NOT work for me...
     (A) I cannot install 'Disk 2', since I never received this with my original (new) purchase in mid 2010.
     (B) I have checked my firmware versions and they are all up to date, as per Apple's information.
     (C) As suggested in another thread, I looked for /Library/Core Services/.diagnostics and it was NOT present. I followed his instructions, downloaded the correct (I believe) dmg, and installed it. It is in the correct place, and I can see all the invisible files using Pathfinder.
     (D) When I re-start holding down the D key (immediately), it just goes through the normal boot routine; no evidence of AHT.
     (E.1) When I re-start holding down OPT-D, I get a spinning globe, and then it prompts me for a network (wi-fi) connection.
     (E.2) For some unknown reason, the prompt identifies between 2 and 5 of my --neighbors'-- routers, but does not show mine. (??!!)
     (E.3) The routers are listed alphabetically; however, my router SHOULD be at the top of the list by this criterion, but it is nowhere to be seen.
     (E.4) The 'internet recovery' process then allows me to enter a network name AND password. I do this, for my current wi-fi router, and the process rejects it as an incorrect login ID. It is NOT an incorrect login ID!
So, now asking Sean and Andy (or anyone else) for further suggestions... ??? As Andy suggested, many people ask questions here because they have -already- worked through the 'official' recommendations, and have found them to be inadequate.
Any advice would be appreciated! TIA.
Ed

G5 Full Speed Fans/ The Apple Hardware Tests Error Code

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