Sony RX100 issue (White Line appear in object on a lcd)

http://www.youtube.com/watch?v=dokauevhyGI&feature=youtu.be

I got the rx100 used from Amazon warehouse, it said was good condition.

After play around for an hour or 2, i notice the white start appear in the lcd when i try to focus or take a image, does not appear in the image itself but is appear in the lcd, i try diffeent mode, still the same issue.