[Arakon]

my guess would be that your dvd laser is one step from dieing.
did you have a neo 2.2 in there before?
has the dvd pot been messed with before? check it with an ohmmeter, it shouldn't be lower than 950 or so. if it is, then it's most likely burnt out.
you can also try cleaning the lense with a cleaning cd, but from the sounds of it, your laser is going bye bye.