Dell Backlight Issue?

[neodude]

Hi guys,

I bought a Dell U2913WM from OC about 2 months ago and overall it's been fantastic. Lately I've began noticing the brightness of the backlight is randomly changing up and down by a tiny amount. It's kind of hard to describe, it's very subtle but can happen a few times a second and then be ok for a while.

Is this probably a faulty screen or could something else be at work?

 

[neodude]

Checked that. It's greyed out.

 

[neodude]

Both off. It happens on both DVI and HDMI inputs. It can go for a day or 2 without doing it at all and then can constantly do it for an hour or so. Seems to happen more after first powering on.