US Patent 7774649 Self-service terminal

A self-service terminal comprises a pc core and at least one module, which can be powered down independently of the pc core, the terminal has a control application and an agent arranged to monitor the fault state of the at least one module and cause a fault signal to be sent from the self-service terminal when the fault state of the at least one module is characteristic of a problem with the at least one module. The agent is arranged to determine if the module has been powered down; whereupon the fault signal is buffered until the module is powered up and a determination as to the fault state of the module is again made. The fault signal is only sent if the fault state still indicates there to be a problem with the at least one module.