I built the PC myself, don't have the MB info handy. The video card is an AMD Radeon HD 5450 1gb. The tv is an Element ELEFT406 40".
Funny enough I remembered today at work that someone gave me there old video card, a PNY GeForce 8400 GS 1gb. So I brought it home to see if it would fit on my motherboard and it does, that's what I have set up right now. Unfortunately I had the same problem with it, the monitor display is fine, the tv display is too big. Fortunately after looking over the remote for the tv some more I fixed the problem. There is an "Aspect" button on the remote. While scrolling through that I was able to get the image small enough to fit. I looked in the tv settings area and couldn't find the aspect ratio settings that I thought were there. So now it looks like the problem is solved.
Thanks for your help.