13" aluminum unibody, 2.0 or 2.4 GHz Core 2 Duo processor.

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AHT error working fine but .

Hello, Apple Hardware Testis giving a error of 4sns/1/40000000: TC0D- 107.250

Anybody know what is the problem ...

Answered! View the answer I have this problem too

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Hi, According to my source the TCOD is a CPU die temp sensor. As to what it means I have not a clue--does the computer work? If not it may mean the CPU is bad. If the computer works I would ignore it.

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I am still trying to research this. It is a temperature sensor problem, I won't commit to the CPU part yet. Strong chance it is firmware related.


Hi AB, Here is a link to the reference I am using. See what you think.



computer is working fine . suddenly i run the AHT on it . it showed me this error.


If the computer was running fine why are you trying to find something wrong? If it ain't broke don't fix it. Of course maybe you should stay up nights fretting about it ;-)


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