Electronic device and image forming apparatus switchable between power states based on detection output of human detection sensor

An electronic device comprising:

• a human detection sensor that detects a person existing within a predetermined range around the electronic device;
• an operation device that accepts an input of an instruction;
• and
• a control device comprising a processor and functioning, through the processor executing a control program, as a controller that sets the electronic device to a first power state where the electronic device is ready to normally operate or a second power state where the electronic device consumes less electric power than in the first power state, the controller allowing the electronic device to transition to the first power state when a person is detected by the human detection sensor while the electronic device is set to the second power state,
• wherein when the operation device accepts an input of an instruction to allow the electronic device to transition from the first power state to the second power state, the controller executes transition processing for allowing the electronic device to transition from the first power state to the second power state and sets the electronic device to the second power state,
• when a person is detected by the human detection sensor during execution of the transition processing, the controller suspends the transition processing and maintains the electronic device in a state midway through transition from the first power state to the second power state, and
• when a period of suspension of the transition processing reaches a predetermined specific time, the controller restarts the transition processing and then sets the electronic device to the second power state with completion of the transition.