cdx problem... please help.

[hogfishmaster]

My sega cdx has problems. The genesis part works perfectly. The cd part seems to work on certain games. Mortal kombat cd works perfectly every time. On some other games, the disc starts spinning, then a clicking noise starts and I get a no disc message. Other times the disc keeps spinning and I get a "searching for disc", or "please wait." Any advice would be helpful. Thanks alot.

EDIT: Local gamestore said they fixed, but when I went to pick it up, the problem was there still. At least they didn't charge me. Any other advice? Please help. Anyone know a reputable repair place?
Steve

hogfishmaster