a process for a monitor working in a dpms mode applies when a monitor ends a working mode and enters the dpms mode . in the dpms mode , when the signal processor of the monitor detects there is no signal input to the connecting interface , the signal processor will be off and inform the micro - controller to open the signal detecting function to find whether there is a signal input to the connecting interface . when the micro - controller detects there is no signal input for a certain of time , the micro - controller will enter the sleep status . as a result , the purpose of saving the electricity can be achieved .