n-vi laser mechanizm

Posted by: slowshadow on 30 August 2017


 can someone please,tell me what laser mechanism is on n-vi? Every time I try to play dvd I got no disc on display but it still plays cd's fine. does that means something is wrong with laser mechanism? if so, why it still plays cd's and dvd not? does anyone has similar issues and can it to be serviced?