I got my mini sterio 4 years ago and now when i play a cd, it will play for only a few minutes and then the song stopes and the LPD screen sais `NO DISC`. I eject the cd and put it bach in but it does the same thing over again. I cleanes the lazer with a cd lazer cleaner but that didnt fix the problem. Can you tell me what it is? Renee :)