When I attempt to put a CD in the CD slot it accepts the CD but then rejects it straight back out again. The radio works fine.

If its a 6 disk cd system the cd tray is wedge causing the cd option to not work. Most of the time one of the cd slipped out of its position causing it to wedge

IF you used a knife to attempt to remove the second cd that was stuck and the blade went UNDER the cd, it might have hit the the head of the cd player and shorted something out. IT might have also cause the head to be jammed and it wont move. The only thing that you can do now is remove it.

Not sure here but try this ,insert a empty cartridge and then turn radio on ,then press reject cartridge and see if one cd magically appears in the cartridge .This normally shows as error 1 and its caused by the battery being disconnected with the cartridge in the player

No it doesn't. The head unit is faulty and requires repair/replacement.

check the wirings of your speakers and then check the settings on your radio.

I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482

We have tried several of the solutions offered. (i.e. holding eject button down several seconds and then pressing again; inserting another CD into slot 1.5 " and using eject button at same time; pulling the fuse on the radio and waiting 10 minutes w/o using key in ignition and then reinstalling fuse. NONE of these worked. There's a certain amount of satisfaction to "fixing" a problem on one's own, BUT nothing we read about and tried worked. Since we bought the 2005 RAM just last week, we're going to take the problem back to the Dealer to fix. THANKS.

it is unplug

Hi, Check fuses, check the ground.

Hello, I just removed the 6-disc player from my 2001 Trooper. To remove it: 1) Remove the two screws above the radio area in the black faceplate 2) Remove the one screw located between the ash tray and the lighter. 3) Remove the four screws (two on each side) from the front center console cover and pull it back (you will need to shift into 2 or L) 4) Pop the black face plate off (there are some metal brackets holding it on that need some light force to pull out. Nothing should break) 5) There are two screws for the CD player and two screws for the radio. Unscrewing them will allow you to pull out the radio and disconnect the smaller CD wiring harness, then you can pull out the CD player.
When I unscrewed the CD player unit, I found that there are six plastic halos that hold each disc and move them up and down as selected. These had broken in some places and the discs had dropped to the bottom and stacked, so nothing could move...hence the clicking sound. Because there was a severe jam, nothing else could be loaded either...hence the error message. I'm attempting to superglue the pieces back together to see if I can reset it. Otherwise, I'd recommend you replace the unit (most likely what I'll do).
Hope this helps!
Ryan

Just took one apart tonight. Same problem, put in cd-played fine-push eject then click click click.
2004 nissan sentra 140 watt single cd player/radio.
This dash comes apart by pulling the top of dash (with the tray) straight out the clips should release. the bottom part had to be pried a little, then remove four screws and slide out the radio still attached to the mount and dash etc. One screw holds on the top of the stereo. After removing the screw you must pry the top off. Now it gets a little tricky, you must remove the cd player portion, however there are 5 tiny springs holding it down to some pads. The two springs in the rear are under a piece of the stereos frame held on by two screws, I had to use various sizes of tweezers to get the springs off. Lift the player out of the radio about an inch, you will see one 1/2" ribbon in a connector, the top of the connector slides out along the ribbon to release. The other ribbon about the same size plugs into a small daughter board in the radio, it just pulls out and pushes in (you can feel it is reinforced). once out turn it over and you will see what would be considered a gearbox, (small white gears in a see through case) one of the corners of this case has a screw through it. This corner has broken away from the board letting the gears come apart when trying to eject (this is the clicking). I took a soldering iron and melted the plastic back together and put a small amount of 5-min epoxy on for good measure. When putting back into case you can hook up the ribbon cables before all the spring grief and test it out. Mine worked perfectly again. Be care full when putting back together, there are a lot of little micro switches that must be in the correct position) Example, if the cd is ejected the white arm on the right side must be in the correct position. the read head (laser) must be away from the center of the cd. I believe it was easier to put together with it in the cd-in position (without a cd in it) so the laser must be toward the center of the cd. Don't force the laser, use the worm gear to move it in or out. I couldn't put one of the springs back on but it still works fine Good luck, it's not as hard as it sounds