On Friday I took delivery of my Dell U2713HM monitor from OCUK. It was all going well until I noticed that when I have certain windows open the monitor makes a buzzing noise. I noticed someone else had this issue on the Dell forum but after they tried doing a factory reset etc there weren't anymore posts from Dell. Is this normal for a monitor costing this much? I find it really annoying having to listen to this buzzing noise in the background. Its not constant either so the loudness of the buzzing changes depending on what windows I have open! Certain white backgrounds and a particular spreadsheet of mine make it buzz everytime. In the spreadsheet if I minimise it then the buzzing goes away...restore the windows (maximise) and the buzzing starts again! I tried connecting the monitors power plug into another socket on the wall and this made no difference. Before I had it plugged into a power strip. Is the monitor faulty? Any ideas or help anyone can offer? This monitors fantastic but this buzzing noise is a pain! I'm running Windows 7 Pro 64bit and I am using Displayport for the connection to the Intel HD 4000 graphics card on the PC.