NEC DVD_RW ND1300A won't recognize DVD's

Hello Folks,
I’ve looked through the forums and can’t find anything similar to my current problem.
All of a sudden, for no reason, my drive will
Burn DVDs
Read CDs
But it won’t read or recognize any DVD I put in. it was fine yesterday, I’ve done nothing to the thing. I’m getting “Please insert disc into drive D”
I had some dvd files on the hard drive, successfully burnt them to disc - which my PC woudn’t recognize. I put it in the DVD player and it works. Hurrumph!

Any suggestions?

Thanks in advance, Herdsman