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The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.

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AHT (Hardware Test) Error 4MOT/1/40000003: EXHAUST-704?

Hello. We recently purchased a 2010 MacPro over the internet and have been running tests to make sure its in working condition. Apple Hardware Test came back with error “4MOT/1/40000003: EXHAUST-704” and we cannot find any information regarding what specifically the problem is.

The computer has two GPUs, a Radeon RX 580 and Radeon 5770, it’s a 5,1 and has 2x SSDs and 1x Traditional 7200rpm platter/rotational drive. Any help deciphering this error message would be appreciated.

AHT (Hardware Test) Error 4MOT/1/40000003: EXHAUST-704?

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Sounds like fan motor fault..

https://www.cnet.com/news/how-to-invoke-...

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Yes, but a fan motor for what. The case , GPU, power supply...

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Its one of the case or CPU fans. Hoe about installing TG Pro to see if that can help point you in the direction you need to look at.

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