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pls clean ur LENS like this ur lens got dirty and giving u problems
open the dvd tray u can see that shiny eye like thing try cleaning th lens gently in round movement with a tissue paper or very soft cloth used to clean lcd screens see if it works , other wise ur DVD drive lens got weak from use now adays service centers are getting tons of them everyday for replacements
Not wishing to ask a foolish question, but what do you expect to see on a blank disk?