Cd will not play

First thing I would do is clean the laser. It's the most likely cause and a cleaning disk is only a couple of quid.

Hi,

The laser lens in your player might be dirty or failing.
Try the following solutions:
Clean the laser lens with a DVD player lense cleaning disc.
Lense cleaning discs are available at many electronics retail store and websites.

Laser disc reader may be faulty

Hello
If it does not play the cleaner disc, just inspect whether the disc inserted in spins inside it. You can check this by open the upper cover of the player, and inserting a disc into it. If inserted disc spins inside, and the player won't read it, the fault is with its laser pickup unit, and it should be replaced with same type and number.
If the disc dos not spins, the fault is with the sled motor [the motor that spins the inserted disc], has damaged, and should be replaced. OK.

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.

RD probably stands for "Reading Disc" and ND probably stands for "No Disc". If the CD player doesn't recognize any discs, then either the laser is dead or the motor has died. MOst likely you will have to replace the unit.

CD Spindle motor maybe at fault.

CD lens may be defective or just need cleaning.

Have you tried cleaning the Lens? nd means No Disc, indicating that the Lens is not picking up the signal, and so is indicating a 'No Disc'

If you sure that the system supports the disc's format.. and it wont play other discs... try to clean the CD lens. CD lens cleaning discs: Every CD, stereo equipment, department, discount, store - and even sidewalk venders - carries CD lens cleaning discs. Are they of any value? Can they cause damage? I generally don't consider CD lens cleaning discs to be of much value for preventive maintenance since they may just move the crud around. However, for pure non-greasy dust (no tobacco smoke and no cooking grease), they may not hurt and could even do a good enough job to put off a proper cleaning for a while longer. However, it's also possible they will ruin the lens. Consider that the worst thing to do to a precision optical surface is to wipe it with a dry cloth as this is likely to scratch the surface as it rubs the dust over it. To the lens, a speck of dust is like a boulder. Once the lens is scratched, replacement of the entire optical pickup is the only remedy. And, since there are absolutely no sorts of standards for these things, it is possible for a really poorly designed cleaning disc to damage the lens even if the dust itself is non-abrasive. In addition, if the cleaning disc doesn't look like a CD to the optical pickup or disc-in sensor, the lens it may not even spin. So, the drawer closes, the drawer opens, and NOTHING has been accomplished! (But at least no damage will be done.) As if this isn't enough, NEVER put one into a high-X CDROM (DVD player or DVDROM drive). The high speed rotation may cause the cleaning disc and/or player/drive to self destruct. And, don't try a cleaning disc on an automotive CD player that sucks in the disk - it will get stuck.