I just got off the phone with Sega Parts, Sega's Offical Repair people, and they no longer repair CDXs. So if it breaks, like mine did, you're pretty much screwed =(
I will keep my CDX as it still plays genesis games, and tinker with it and maybe be able to fix it myself. The load screen comes on but it wont load the game, it doesnt spin. However it will play an audio cd.