Failing navigation unit may display disc error on screen on Nissan 350Z

A navigation unit that is failing can intermittently display a disc error on the screen.
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Average mileage: 87,666 (56,000–130,000)
3 model years affected: 2003, 2004, 2005
8 people reported this problem
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problem details
2003 Nissan 350Z 84,000 mi,
The nav screen goes black intermittently and the nav door does not open and close even when I run the car off
2003 Nissan 350Z 120,000 mi,
Doesn't read navi cd either
2004 Nissan 350Z 130,000 mi,
same problem. hasn't been fixed, unaware of cost...