13. Getting Things Fixed

A: Thank you for coming so quickly.

B: What seems to be the problem?

A: All the channels suddenly stopped working.

B: Did you make sure all the cables are plugged in?

A: Yes, I checked and double checked them.

B: There may be some kind of signal interference.

A: Is there any way you can test that?

B: Of course! Give me a moment, please.

A: Do you know what the problem is?

B: Not quite yet. So you can't change the channels?

A: No, not at all.

B: Well, you'll be able to once you change the remote batteries.