Patent ID: 8832477

Claim:
An electronic apparatus comprising: a first board that includes a first processor; a second board that is connected to the first board with a bus, the second board including a second processor; and a disconnecting/connecting unit that is provided on the bus between the first board and the second board, and that, when the first board is in a first state in which power of the first processor is turned off and the second board is in a second state in which power of the second processor is turned on, disconnects a signal supplied via the bus between the first board and the second board, wherein the first board includes an energy-saving control unit that sends to the disconnecting/connecting unit a control signal while the first board is in the first state in which power of the first processor is turned off, and the disconnecting/connecting unit includes a plurality of switches that are controlled by the control signal, which is sent from the energy-saving control unit of the first board, to disconnect the signal supplied via the bus between the first board and the second board.