Hi I have just purchased a SIlvercrest upscaling DVD play, second hand. There is no manual. I have plugged it into my projector through the VGA port and only get a green screen with the 'home' screen showing only a very small part of the screen, so I am unable to go into the menu to see if I can fix anything. I have used the projector with a computer and it works fine, so it'\s an issue with the DVD player. Can you help?