Why is my CPU fan running constantly. EVEN WHEN THE UNIT IS OFF!?
When powering down the (A)TC-780A the CPU fan stays running, or worse, ramps up to 100% and stays running. I want to reiterate, this is with the unit off. The power light on the front is dark. Clean install of Win10, all drivers and BIOS updated. Any help appreciated.
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video is here. https://www.youtube.com/watch?v=Pw7XJ2vR...
par Gary Alexander
Hi @ Gary Alexander,
The unit may be off but there is still standby power available on the motherboard. The Power button is not a power isolating switch.
How long does it stay running for?
Does it eventually stop by itself?
Have you tried refreshing the thermal paste on the CPU?
It may be that the old paste has hardened and is not as effective in aiding the fan to remove the heat from the CPU and it is still too hot when you shut it down.
No detailed BIOS info in the motherboard user manual, but is there a temperature monitor menu area or a CPU thermal monitor setting at all that you can use to check the temp of the CPU?