Cpu fan not starting up at bootup.???

I have a coolmaster areo 7 cpu fan on a abit ns-7 mother board. When i boot up my computer the cpu fan isn`t going and i`ve only noticed when the bleeps come on to say that my cpu is geting a bit hot. :ohmy:

When i move my case to take the side off to see if it`s it`ll suddenly spring to life. Could this be my mother board ir is my cpu fan twitchy. :dry:

Thanks in advace. :D

Bad connection, perhaps.

Try reseating the connector.

It's prolly the fan.
Just replace it.