1999 Pontiac Grand Am Radio will not work.

My instrument panel went out and I replaced the fuse. That problem was fixed but then the radio would not turn on but I could eject a CD from the CD Player. I replaced the "RADIO BATT" fuse and any fuses related. All new fuses, but it still does not work. I believe this could be a theftlock issue, but I have no idea how any of that works.

Also, on the instrument panel, the "SECURITY" light will come on sometimes and I attribute that to installing new Spark Plug Wires and Plugs.

Any help here is appreciated as I do love my stereo system.