: As a last resort, some technicians slightly increase the laser power by turning the potentiometer on the back of the laser pickup assembly (usually clockwise). of a Sony service disc or a guide for a particular DVD player model Fixing a Sony DVD / CD player "No Disc" error.
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You might be thinking, "I have a 4K OLED with Dolby Vision. Why do I care about a 480p DVD?" : As a last resort, some technicians slightly