ok i don't know too much about cd changers but i do know electronics. From wut i can tell, the changer just malfunctioned. Typically the cartridge will eject when the cd itself is loaded back in the cartridge slot. Get wut i'm trying to say. In other words, i think the cd is stuck! I suggest for you to take the changer out and remove the casing. It's really simple to do so. Once you have the casing remove, you should be able to view all the mechanisms/part of the changer. Just be careful not to accidently snip the data cables or anything. OR just take it back to honda?