No cd read on btc 1008

hi; im new here. i have a pacific digital (btc1008im) dvd/cd burner combo all of a sudden it will not recognise any pre-recorded cds music or data. it will recognise burned cds even cds burned with other burners. all DVD functions ok. have tried cleaning lens and upgraded firmware to ver60. no help.
it almost acts like it can’t get passed copy protection on the cds. spins for awhile and then reports no disk present. tried the upper and lower filter thing didn’t help. anybody got any ideas thx. running xpw/sp2