Acard 1-3 Disc Duplicator - POWER TESTED ONLY - SPARES OR REPAIR ONLY

Acard 1-3 Disc Duplicator listed as SPARES OR REPAIR ONLY because. Tried bottom writer again and now says disc isn't empty! Drive lenses could be dusty I suppose. Tested top and middle writers with a DVD and it said the blank disc wasn't empty (they were).

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