To solve the problem in which: in a conventional apparatus that receives depression of an operation key after completion of display by a display unit, input is not received until completion of display, which results in the occurrence of a waiting time of a user.

A CPU 31 starts energizing a preset conduction range (S209), starts energizing an image forming unit 10, a FAX interface 37, and an image reading unit 40 that correspond to the conduction range (S210), and starts energizing a display unit 36 (S211) to end first restoration processing. According to the present configuration, a waiting time of a user can be reduced, which occurs because input from an operation key 35b is not received until completion of display by the display unit 36.