On a similar note, I just inherited a used LTD-163D. I installed it in my Win2000 system and it was recognized just fine. I tested it and it read DVD-ROM, DVD-R, DVD+R discs fine, but not CDROM (pressed silvers), CD-DA (audio), CDR or CDRW discs. It had firmware version GHR3 and so I upgraded to the latest GHR8. Upgrading the firmware had no effect - it would still not read any CD media. The drive tries spinning up and down several times before it go backs to an idle state when a CD is inserted. Any suggestions? Are there separate lasers for reading DVD versus CD media in the LTD-163D? Could one of the lasers be dead? Dirty laser lens? I have GHR7, is it worth trying to downgrade the firmware?