Cannot transfer HD content to dvd

Polaroid DRM 2001G: I seem to have a problem with the dvd burner/player in the unit. It has been giving interment problem for some time now and it seems to have died. The hard drive, recording to the hard drive and play back from the hard drive seem to work fine, but I can not burn programing off to DVD's. Is the DVD unit in the machine replaceable, where can I get one, and it it a simple repair. Or can someone refer me to someone who can make this repair fir me. I don't mind replacing the entire unit but I need to get the recorded data off the hard drive,