hardware test error

I see a trip to your local Apple-Authorized Service Provider in your future. They haven't published those error codes to the public that I know of.

There are a few more symptoms relating to memory that you can check for:

• Open the side door while it is running (there is no interlock) and look for Red LEDs, especially next to memory modules. They indicate bad memories.

• Apple System Profiler -- About this Mac > More Info > Memory ...
- each module should be listed at it correct size. Anything else indicates a failed module.
- each module status should be "OK". A Number indicates the number of single-bit correctable Errors that have been corrected automatically. More than a handful in a month can be a problem.

Most Double-bit errors cannot be corrected, and will most often cause a Kernel Panic (or sudden crash if crash reporter cannot run to report the error).

Hi, you are best off running the Apple Service Diagnostic which explains in plain english what the errors are. AHT is cryptic at best..

I really think we should try to understand these ATH error codes and reference them as most as possible on a website (as more as we understand some, the remaining ones will be a simple deduction). Then, we'd finally know them (because it's not fair from Apple to hide these things; in Mac OS 9 days, no such hidden things existed).

What do you think about that?

You will be better served if you can find the Apple Service Diagnostic for your particular mac pro.. These are much more comprehensive and present a bird's eye view of what problems crop up in plain english instead of the cryptic and stupid code that AHT provides.

Wouldn't you like it if your low level diagnostic said: "Sensor reading above the limit of the device".. versus:

4MEM:0000010212033023/SSD - JUST SOME RANDOM EXAMPLE..

Yes, indeed, but I thought Apple Service Diagnostic tools were also reserved for Apple. It's not correct?

No, I have them.. if you need it. Let me know.