A signal receiver which receives an optical signal from a remote control includes a light guide for guiding a light passing through a front panel window toward a photodetector mounted on a circuit board. A wireless availability server receives a user request for coverage information where the request includes specific geographic location data provided by the user. If the processor is not in the high power state, then it is determined if moving the processor into the high power state will cause the multi-processor system to exceed the specified power limit. The cutout is defined in the circumferential surface and passes through the first end surface and the second end surface.