Hardware Test Message Error

What does the following mean: hardware test error message 4SNS/1/40000000:TC0D-100.250
thank you

Depends. If the sensor has completely failed then the fans may not ramp up when they should to keep the CPU and GPU cool. This could lead to heat failure.
If the sensor requires replacing, then it means a new motherboard. If a connector is loose then it won't take much to repair it.

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    This is a memory error of some sort. We don't have the Rosetta stone for these errors, so I don't know what the rest means.

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    Hi,
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    Thank you!
    Tom

    I'm experiencing the same problem, it's really horrible! can anybody give me a clue? Thanks in advance
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    I received an error message from the hardware test (4SNS/1/40000000:TCOP-85.875) Anyone know anything about this? Problem is that discs will not load.

    Reset PRAM and do the hardware test.
    Reset PRAM.   http://support.apple.com/kb/PH18761
    Contact Apple.
    Genius Bar reservation
    http://www.apple.com/retail/geniusbar/
    Best.

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    I ran a hardware test on my iMac and the following error message appeared.
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    Thanks guys,

    What prompted you to run the Hardware Test?
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    Get iStat Pro and post the fan rpms, and temps, along with specifics on the model of your iMac.
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