Sound problems. I have no sound on commercials. I can hear some channels. The screen says Auto

Question

I have no sound on commercials. I can hear some channels. The screen says Auto Sap. Then some channels say Mono. I know its not a big problem. I was messing with the remote and caused this problem. It was working fine until i messed with it. Dummy me. Don't try to fix it if its not broke. I hope you can help me. Thanks Cheryl Fitzhugh