CPU Fan Error on Post

[Cutlass_Stallion]

Hello All,

First, some select PC specs:
ASUS P9X79 PRO Motherboard
CPU Intel I7-3930K
Cooler Master Hyper 212 EVO

I built my own PC a little over a year ago, and it has worked flawlessly up to this point. On POST, I get the follow message (black screen): "CPU Fan Error! Press F1 To Enter Bios Setup".

I can enter the BIOS no problem. Displayed core temp is 45 C and MB temp is 25 C. I am able to leave the BIOS and start up Windows as normal by hitting Enter twice. This issue only happens on POST.

Attempted Solutions:
* I raised the warning to level to 90 C, however the problem persists.
* The CPU fan is correctly plugged into the proper port on the MB.

It's a minor annoyance having to press F1-Enter-Enter each time, but I'd like things to work flawlessly on boot up.

Thanks.

 

[smorizio]

can be the fan itself has dust or the fan bering is going so it slow to spin up at power on giving the mb a false error. the other issue is the fan or the mb sensor has gone bad.