Dvd-u03s ( scsi )

i have a pioneer scsi dvd-rom dvd-u03s which is still recognised in windows 2000 and xp but refused to read any cd-rom or dvd , the media goes into the drive but it still says that there is no cd in the drive , i ’ ve upgraded the firmware from 1.10 to 2.0 but no way , the drive does not recognise any media ,

any idea ???
is this the end ???

thanks for any response ,

robert ,