TKO-80 NO SOUND

Hey, I'm having issues with an old TKO-80 peavey amp when I plug in my bass it doesn't make a sound it worked for a little bit through the chorus send no idea whats wrong any help.
Could be your cable or your bass? I am not up on what you mean by the chorus send.

You can try jumping the fx loop with a guitar cable or pedal cable.

You can try plugging bass direct into the fx return. It should make some sound but not much.