portable DVD: picture have moved Answered

Hi, I got The Lenco portable DVD Player DVP-X7. I can hear sound and view the picture on an external device. The problem is that the picture on the screen of the portable dvd player is on the right side and cut of. So only half the picture is visible with a black bar beside its and the rest of the screen is grey. its like the picture have moved to the right and now you can only see a part of it. Please help.