new OMD has a hum noise

I just got my OMD today and when I fire it up no matter what lens I have on it there is a sound coming from inside the camera. It sounds like a fan in a computer....

I thought at first maybe the 12-50 was trying to keep focus but it kept doing it and I switched to my 20 1.7 and that is doing it too.

Is it a bad unit or am I missing something?

Thanks for the help as always

--
"Every time I set up I learn something new".