I have a Sony RDR-VX511 player/recorder for DVD/VHS tapes and discs. The DVD burner has stopped working and I need to replace it. Does anyone know what to replace it with or what unit will fit and work with this unit? I am not very handy with things like this but I had the DVD burner out and could find nothing wrong with it visually but I would like to replace it whole with a new unit if possible. Can anyone help me