A system allows a user to obtain information about television programming and to make selections of programming using conversational speech. Tooling for manufacturing include a first mold defining a first mold surface and a second mold comprising a rigid layer and a heated layer secured to the rigid layer and defining a second mold surface. Examples of the magnetic material meeting this condition are La13, Fe2, Fe2, and Fe2, each containing 50 to 60 atomic % of transition metals such as Fe. The display housing has an opening for fixing a replaceable camera module or a replaceable cover module selectively. As a result, the scan chain is robust to faults affecting power andor control signal supply to any one power domain.