[qanda]This question is published in the hardware section for the NEC ND-1300A. Click here to view full specs.[/qanda]I have a Nec nd-1300A, and without any reason it only reads cd's what is wrong with it
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Have you tried both burned and pressed (commercial) DVDs?
Maybe try the drive in a different PC and see if it reads DVDs there.
The ND-1300A is also a very old drive, so it could just be broken.