After recording a disc, one or more of the drive doors on the DUP-07 does not open. What does this mean?
The discs in the closed doors are bad. When you receive a bad copy the drive door containing the bad copy will stay closed. Only drives with good copies will open for reloading. You may reload the drive with the bad copy by manually opening the drive door.
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My discs are constantly rejected. Burned copies are bad.