Ideas! CD Player not working

[E30RUNNER]

I have a stock 6 CD player that refuses to play any of my cd's that I stick in. I've tried burned and out of the wrapper cd's neither work. The player accepts the cd's makes some noises like it's going to work but then spits out the cd.

My car has had a sub and amp installed I'm hoping that this didn't affect my cd player. Any ideas of what I can do to try to get it to start working???

99 4runner