Hello I need your help

My radio in my 1989 allante has static and no stations. Everything else works. I was told the cdm was bad so I replaced it and still having the same problems. It is the amp/receiver combo and I do have an jl amp hooked up with a cd changer complimented with the fm transmitter. I bypassed the fm transmitter and still having the same issues. Does anyone know what the problem could be