Changed my nad for a marantz but find the CDs jump .do they have to be absolutely clean to play well.on the nad no such problems.thanks Rob.

Hello Linda, what brand is your DV3100, Marantz or Furrion?
In the same way it is possible that your player needs a cleaning of the Laser Pickup
Try playing a DVD, if you read it, the lens would supposedly be clean and you would have it under the infrared reader, in charge of reading the audio CDs or video CDs
I hope my comment has served you
Greetings Franco Dosil

Hola Linda, que marca es tu DV3100, Marantz o Furrion?
De igual manera es posible que a tu reproductor necesite una limpieza del Pickup Laser
Prueba reproducir un DVD, si lo lee, supuestamente la lente estaria limpia y tendrias bajo el lector infrarrojo, encargado de leer los CD de audio o CD de video
Espero te haya servido mi comentario
Saludos Franco Dosil

Does the volume fluctuate through speakers?

its best if you let a professional tech work on it beause there tools that need to be used to check where the problem came from.

Get yourself a lens cleaning kit and clean the lens of the player. I had the same problem and cleaning the lens solved the problem. If that doesn't help I am afraid that you will have to get it serviced properly

The problem is in the laser for sure. Try cleaning with a cd cleaning tool. It's the easiest solution because changing the laser is not always available solution.

Stelios.

just replace the ribbon wire of your cd player or check lense.by. jhuntech17

Try taking the outer casing off and manually cleaning the laser lens with alcohol , this should work for you.

Cleaned laser lens carefully with a cotton bud dipped in isopropyl alcohol. Waited for it to dry before trying. Success!!

I FIX MY NAD 5000 CLEANING THE LASER LENS USING COMPRESS AIR

Hey, I think you can bye new laser here http://www.pltv.org.uk/laser.htm I have a nad 5300 monitor series, same laser as 5100, you can buy the hole cd player from http://www.miguelovitch.dk Laser work, but problems with cd transport. When i 'help' the cd transport, cd play as expected. And i agree, it is a nice cd player, also i have heard lot of nad cds on quad 405, sounds realy good. Try to visit my site, i also have a lot of free schematic for nad, denon, quad and mora. Also repair notes for amplifiers, tech videos, diy schematics and more.. Also at this moment i am working on a new 'nad cd service movie) including cleaning, maintenance, repair and more on nad 522, 501, 502 c521 and more see you best regards michael miguelovitch http://www.miguelovitch.dk