Hi, I am thinking of buying a used Visio L32 at a...

Question

hi, I have a Visio L32 HDTV with two vertical lines on the screen. They are darker than the rest of the picture. A friend of mine said these a pressure point lines, and I am wondering if this problem can be fixed. We watch it across a large room so we are not right up to it and it doesn't seem to be real bothersome, but I would like to fix it if possible.
Thanks!