Contour remote

I have a contour receiver that when it was set up it was able to control my sound bar (Sony), DVD blue ray player ( Sony), and TV ( LG ) with my contour remote. About a week ago I was not unable to bring up the guide, and was unable to channel up or down. After chatting with a Cox tech. We were able to get the guide to respond but now I am having to use each individual remote to do the same thing. Can someone give me some step by step instructions to get back to where I was before? I really don’t want to have an in-house tech because of the cost. Thanks