My CD player won't play the CDs that I put in it

clean your cd player with a cd cleaner

Check the mode of operation. There can be a setting where it just plays one disc. Random or mixed will give you more songs to get to other discs.

That is not unusual For some cd players to do that,

If the player do switch ON, and it won't read CDs, the fault might be to its optical pickup unit. Seek tech support.

Are these CDs that you burned yourself? Older CD players won't recognize the audio file format of this kind of recording, only the established file format that typical retail CDs have used for years. In recent years, CD players have been developed to recognize more file types than just the old format; but with an older player like you have in your car, it wouldn't recognize what you were trying to play, as if you put a DVD in. It balks, and spits it out. You can burn CDs with the correct file format, you just need the appropriate software or file translator.

If it is just a standard cd player it will only play audio cds.

will it play? you may have blown an internal fuse in cd player,

CD players commonly will not recognize some types of CD, eg MP3 recordings, or maybe CD-RW recordings.

However if this is happening with CDs that would previously play OK, then it could be

- scratched or dirty CD surface
- contaminated laser lens in the player
- laser lens has become misaligned

The last 2 need a service technician, but it may be cheaper to buy a new player.

Hello

Check all connections, such as from player to amplifier or receiver and receiver to speaker. Check and clean contacts on RCA jacks and cables and try a different input on the amplifier or receiver.

Clean the lens. Use only a special CD lens cleaner and follow the instructions carefully.

Check the traverse assembly (the metal rod that the laser travels along and the gear that drives it) if CDs aren't recognized or won't play, frequent skipping occurs at random, CDs randomly get stuck in one spot, the player can't find tracks correctly, or cleaning the lens doesn't work. Dust and lint may be interrupting its function.

Have the laser-head assembly checked by a repair person if the traverse assembly seems intact and free of debris.Look for broken plastic parts, such as gears and clips,look for loose or broken internal connections.possibly have gears and belts replaced.