Clean cd-g lens - Vocopro DVD-Duet 80W CD / Dual Cassette / AM / FM Karaoke System Shelf System

Check the disc you're using for scratches and dirt. If the disc is damaged it won't play properly, regardless of the CD player's ability to function. You can use a CD repair device like the "Disc Doctor" to repair the CD or purchase a new CD.

Clean the laser lens with a CD laser lens cleaning disc. CD laser lens cleaning discs can be purchased at most electronics retailers or online. Insert the laser lens cleaning disc and follow the instructions.

Insert a correctly-formatted, undamaged disc into your player. Listen to see if it begins to read the disc. If it continues to make no sound and gives you the same message, then the problem is probably that your disc is not spinning in the device.

Clean the lens while the DVD player is open. A dirty lens is most likely the cause of your no-disc error. The lens should be cleaned with isopropyl alcohol and a cotton swab.