Controller, the portable terminal apparatus and a program

Until the terminal device failure is restored from the occurrence, unnecessary display contents on the display screen to provide a control apparatus can be prevented from being displayed. When the failure monitoring unit (104) detects that a failure has occurred in the display control unit (102), and outputs the display update control section to (107) a fault detection information. The display update controller (107) is responsive to an output of the fault detection information to stop the updating of display by the display unit (103). Further, when the recovery monitoring unit (106) detects that the failure in the display control unit (102) has recovered, and outputs it to the display update controller restoration detection information (107). The display update controller (107) stops updating the display in response to the failure detection information, and controls the display part (103) so as to start displaying updated in response to restoration detection information.