Mata DVD-R UJ-815 - Device Revision D0C4 in a PowerBook G4 has suddenly
stopped accepting data or music CDs. They go in and are immediately ejected.
The devise has faithfully burned many CD-R but now is useless.

Any ideas about how to fix the problem would be appreciated.

Please note that DVDs have not been used in the devise and this problem is
not addressed by the Apple firmware update for Pioneer made SuperDrives
using DVDs.

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