I wrote a review on the NV3 for POPULAR PHOTOGRAPHY & IMAGING magazine. You can read it here:
http://www.popphoto.com/Reviews/Cameras/Camera-Review-Samsung-NV3
I had a similar issue with this same model when Samsung sent me a demo version. The LCD screen electronics were bad and had to be replaced. If the camera is under warranty, get Samsung to fix it. If not, you're going to have to decide if it's worth $100 or so dollars to fix a $230 camera or not. Based on your question, you may be willing to live with it for a while, but sooner or later, the entire LCD will go south, and then you'll have to make a decision.
Based on my experience with the NV3, I REALLY liked the coolness factor, but, as my review states, was disappointed with the image quality. And to me, that's the main reason for buying a camera, regardless of how much neon and cool stuff are built into it. Overall, if you have the money, it may be worth considering replacing the camera when you get sick of the LCD situation rather than trying to fix it. Sorry I can't be more optimistic, but feel I need to be honest with you in my opinions. Good luck with this and happy shooting!