My monitor works, the screen. But the buttons stopped working, I can't turn it off, or use the menu button or anything.

This is weird cause this happened to my old 19" lcd last week, but it was old so I thought it died. Now on my dell 24" the same thing is happening, but at least this one is "on" so even if I unplug it, it resumes to on.

any ideas what's up? obviously it's not dead, but not begin able to use the buttons suck.