Fans won't turn off after Macbook Pro is shut down

I am posting on behalf of a friend on mine. He has a 1st Gen Macbook Pro Core Duo and whenever he shuts the machine down and the magsafe is still connected the fans keep running even though the machine is off. If he unplugs the magsafe adapter the fans stop but if he plug it back in they start again.
I have tried resetting the PMU/SMU, NVRAM/PRAM and it is still having the problem. He is running 10.4.11 and I checked to see if he had all the latest firmware updates and he does. I even tried re-installing them but it said your machine doesn't need this update.
Any help is appreciated. Thanks in advance.

Does anyone have a answer for this? Thanks

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