You want to know whether normal RCA auido video cable can work for component input form your DVD to lcd tv?

If both have component inputs/outputs of the same type, i.e., RCA connectors consisting of yellow (video) audio (red, right / white left) then it'll work. Can't guarantee the video quality though. It may have color smearing or video smearing and possibly ghosting of the image. For short runs (3 feet or less) it should provide for an acceptable picture.

It is possible to use audio cables for runs up to 20 feet, but the same caveats apply.

Best thing to do is try it and see.