dvd drive haves stoped working

Hi all ok im stuck the problem is my Sony DVD rw dru-810a has stopped reading disks I think the problem started when I was copying data from a DVD to my hard drive, some way in to the possess of copying to my C drive my poota froze so I restarted it when I tried to start the copying again the DVD drive did not recognize that there was a disk in the drive. I have try different media, changing ide channels, clearing the cmos, updating the mother board bios, tried (kprobe) it didn’t recognise there was a disk in the drive neither dose Nero, I tried to boot up with win xp disk no luck, tried safe mode not hapin, have uninstalled the drive and reinstalled the drive, have try to find firmware to update the DVD drive bios but none seems to exsit yet for the dur-810a did find some for the dur-800 but thought it might not be the way to go think it just changes the region any ways or somit, it did cross my mind that the drive might be stuck in a loop of some sort coz of been interrupted by the crash but I just don’t know I have looked on many web sites for ideas on how to fix my prob so far no luck this site looked like one of the most helpful so hope someone can help
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