When inserting a c.d it first begin loading disc then it reads no playable files on disc next it ejects and reads remove disc....no music played at all..... What could be an intelligent soultion to solve the problem?

It sounds as if the player laser is dirty. Vacuum all around the insert slot and then take some canned air and blast some air in there being careful not to inject any liquid propellant while doing so.
Try that first, and test. If that doesn't help, get a cleaning CD and follow the manufacturer's directions.
If that still doesn't help, you've got yourself a failed disc reader and you'll need to replace it. Good luck!

try a CD with no scratches?
to test a player, one most try many CDs
to truly test it. (a new CD is best ! or scratch free)

next the WORD CD means nothing much, round disc, sure
on such a very old car 2002 CD means this.
plays, ONLY!
CDDA (compact disk, digital audio)
means only store bought disks work. CDDA.

The never works list:
MP3 discs or other music formats common today.
in fact can't play file formatted music.
CDR
CDRW
DVD of any kinds
Bluray

when new, the car had a book on this head end.(in glove box)
stating what it would play, NOT MUCH. CDDA for sure. works and is to be checked first.
much later , it can play many newer formats..
go to walfart , buy any CDDA, off shelf.
try that. see if those work first.
I like Country Joe and the Fish....

The lazer is shot ,It is not reading the disc.

You listed this in the auto section, so I'm not sure just where you have the problem. When you receive an error like this and you've tried several disks with the same result it means your CD player is bad and must be replaced.

Subject: Radio With Six Disc CD Changer Does Not Recognize Loaded CD And Displays An "INITIALIZING" Message, CD Will Not Play, CD Cannot Be Ejected, Or Disc Icon Does Not Illuminate (Reprogram Radio)
Models:
2005-2006 Chevrolet Avalanche, Suburban, Tahoe
2005-2007 Chevrolet Colorado, Express, Silverado Classic, TrailBlazer
2005-2006 GMC Yukon, Yukon XL
2005-2007 GMC Canyon, Envoy, Savana, Sierra Classic
2005-2006 HUMMER H2 with Six Disc CD Changer Equipped Audio System (RPO UC6)
Condition
Some customers may comment on any of the following conditions:
• The CD loaded in the radio will not play.
• The CD loaded in the radio will not eject.
• The disc icon on the radio will not illuminate.
• The radio displays an "INITIALIZING" message for approximately 30 seconds after vehicle start up.
Important: Do not attempt to play CDs with paper labels on them in this CD player. The labels may warp or wrinkle and jam the CD player mechanism. Refer to the Compact Disc Care and Cleaning procedure (Document ID# 1656123) in SI for more information.
Technicians are to reprogram the radio with new operating software using the following procedure:
1. If the radio has a CD(s)2008 General will be necessary to reset the radio and remove them
before the radio is reprogrammed. Remove and reinstall the radio fuse to reset the radio and then eject the CD(s). If cycling the power to the radio does not allow the CD(s) to be removed, the radio may have another failure that will not be corrected by the reprogramming procedure that follows. Refer to the Diagnostic Starting Point - Entertainment procedure in SI to begin your diagnosis of this failure to eject CDs concern before reprogramming the radio.
2. Reprogram the radio using the Service Programming System (SPS) with the latest software available on TIS2WEB. Refer to the SPS procedures and the Radio Programming and Set procedure in SI for more information. As always make sure your Tech 2® is updated with the latest software version.
3. Verify proper operation of the radio and make sure that all CDs can be ejected.

Hope helps (remember to rate this).

The following is the owner's manual for your 2004 Dodge Neon:

http://www.dodge.com/en/owners/manuals/index.html?year=2004&nameplate=Neon

P.99 describes how to load discs:

1. Select and press any numbered button without an illuminated light above it.
2. Insert the CD while the light above the chosen button is flashing and the two lights on either side of the slot are illuminated.
3. Upon insertion, the CD will begin to play, and both the button light and the lights in the corner of the loading slot will illuminate.
4. Repeat the process for loading any additional CDs. The CD playe rwill stop while additional CDs are loaded.

Playing Discs
The radio will show the CD number, the CD track number, and the Track Time Elapsed while the radio is in the CD mode. IF more than one CD is loaded in the changer, the changer will automatically play the next disc after playing the last track of the current disc.

Wow, that's a lot of typing.
I didn't know the 2004 Dodge Neon had such a nice changer.
Good luck.

On some DVD player there is a little pinhole next to the opening or tray in case the disk or tray won't eject. You can unbend a paper clip and insert it into hole and see if it will eject. If not you will need to remove radio and have it serviced.

Your vehicle is not that old, take it to the dealer and see if your radio is still covered under warranty.

Good Luck!

My endeavor has done this error 3 a couple of times and the cd changer basically shuts off all lights and won't do anything. Someone on another solution page said to slide a credit card back and forth in the cd opening to fix the problem. I've done this both times and it has made the changer play again as if nothing had happened : )

Mostly The cd is jammed between the laser sensor and the cd rotator.Try removing the audio player and reseting the whole device if possible.Or if you have sufficient technical know how.Open the player try to manually open the disc tray.and remove thedisc.This can happen even  if the disc is broken inside the player.