Hitachi 51F710 Rear Projection Television "cox cable box change channels" Questions

...Cox Cable (no set top box). All other function buttons on the remote work every time. When the channel will not change the channel number does not appear on the screen and sometimes requires 2-4 ...

...Cox Cable box. We have hit something on the remote (we think) and the tv picture cuts all the heads off. The guide that comes on the bottom of the screen when you change channels is not at the bottom ...

cable box from Cox that prvides the HD signal to input #1 or did. Any suggestions? change tv input settings to a different input channel. What buttons did they push? Is it possible that one of them is

...cox cable guy came out a couple days ago because our cable box was acting up and we were not getting certain regular channels and most hd channels(just a black screen) the problem was fixed(weak ...