MacBook Pro not mounting CDs or DVDs

I have a late 2011 MacBook Pro that fails to mount any optical disk inserted into the SuperDrive. All the requisite check boxes are checked on for it to show mounted disks; the disks are drawn in and spin up then they just spin down and sit there until ejected using the eject button. I've inserted CDs & DVDs burned on other Macs and also a music CD and the behavior is consistent for each type.
Is there a way to reset the SuperDrive to re-enable its ability to recognize the inserted optical disks?
Has anyone else seen this problem on this recent vintage system and come up with a solution?
Thanks.
Karl Cook

https://discussions.apple.com/message/12487175#12487175

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