My CD Players don't work

Hi, I don't know if anyone can help. I bought a midi sysyem a few years ago, but after about a year, it stopped reading CDs. I thought maybe it was because it had been fairly cheap, so I bought another, more expensive make, but again, after about a year, the CD player packed in. I have used CD cleaners and also tried cleaning the inside but nothing seems to work. I'd like to know if anyone has any ideas I could try. Thanks