The burner was working fine...for a year or so. Then one day I went to burn a DVD and it just doesn't work. I get error codes telling me there isn't a DVD burner installed, if I remember correctly it still would write to CD's for a while and then it stopped that as well. The last time I attempted to burn a CD it would not work and from then on the door would continuously open and shut, waiting to write the disk. I tried to find the files waiting to be written, so i could erase them, but couldn't. I took it out and put my old CD burner back in so I could at least burn my music again. I feel this is a simple problem to fix, I just don't know what I am doing. Any advice?