Based on a couple of sites I've found the Compal NBLB2 (longer sold) does not allow you to select a video card. Everything can be configured, but not the video card. Therefore, that leads me to suspect that the HD 5650 is soldered into the motherboard.
Perhaps the manual can tell you if the HD 5650 uses any particular MXM format (video card format for laptops).
Otherwise, you can contact Compal and ask them if the video card can be replaced:http://www.compal.com/index.php?option=com_content&view=article&id=109&Itemid=1450&lang=en