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I have a 733mhz Power Macintosh G4 Quicksilver tower that has been my primary Mac since I bought it brand new in 2001. I am currently running Mac OSX 10.3.9. The Mac has 1.125GB of Ram, 2 internal hard drives and an internal CD-RW drive. I am having a problem with the CD-R drive. It reads music CDs and some original data CDs. It doesn't read other data CDs, nor does it read blank CD-Rs that I wa…