NEC LCD3090WQXi Monitor question

[bellimages]

I have a 30" NEC display. I've noticed that there is a buzzing noise .... not loud enough to be an annoyance. But none-the-less, it's a new noise. If I hold my ear over the top of the monitor, I can hear it. I assume that it's coming from the power supply, but can't be sure (I'm not a technician). It's not loud enough to be an annoyance, but I am concerned that it might signal a downturn in the unit.

Ideas or comments?

[Czornyj]

The coil in my 3090WQXi makes such noise from the beginning, it's 3 years old and still works well.