Ahhhhhhhhhh! I just went out to J and R a few days ago and decked out 825 bucks on a Samsung Syncmaster 170t, and now I just realized that its emmiting a low, and slight, but audible noise when turned on! Whats up with that?
Uh. Its a dual interface monitor, and I'm currently running it on analog. Its native rez and refresh on analog is 1280 by 1024, and 60hz. Making it on 70hz makes it worse, and I can't try it with the digital cable right now. The noise is constant, and it never goes away. Maybe its the graphics card I have right now, the system thats listed in my signature is at another place right now, I somewhat moving, so I'm using my old machine right now. Its an ATI Rage 8mb.
I did not realize u were talking about a LCD screen - they don't emit any noise at all unlike a CRT - so u should take it back (unless it's not new and that's why the last guy sold it).
The noise may be coming from the power supply - is the power supply external or internal? It could be that it needs some sort of filtering.