No audio with radio or CD

Hello, no audio output can be due to the audio unit having an internal failure, wiring connections being incomplete, an amplifier that is compromised or failed speakers. Since you are flying blind by not knowing what happened when the unit stopped working, you'll first need to check to see what components are there, and what may be missing. Sometimes people remove components when selling a vehicle (like a good amplifier) and leave the audio unit inoperative. Just a guess, but maybe some kind of components were removed, and you'll have to sort it out. Seek guidance at a local car audio shop near you - you might find that's quite helpful.