"Radio Problems on 1998 Cadillac Catera"

1998 Black Cadillac Catera

I have a problems with my 1998 Cadillac Catera radio. The radio has no sound, even  the it light up and I still can change the channel. I’ve already checked fuses on drivers seat. And the worse problems, the manual that comes with car does not show how to entering the code. I need to know where is the amp lock too.

Answer: Try this, disconnect the battery which will then reset the computer upon reconnection, I think this radio has a door chime that runs through it.