Hello, My 22 inch widescreen flat panel Dell monitor (E228WFP is the model number I believe) which is almost 2 years old has had a weird problem since I got it. When the computer is on and the monitor's display is turned off and it's on standby (the green light is yellow), the monitor makes a high pitched noise (I don't really know how to describe it) lasting about a second. It stops for a second and then repeats and follows that cycle. It is kind of annoying. I've never had a monitor do this before. Is there something wrong with my monitor? Why would it be making this noise? Thanks, Mark.