Lucasmdo10

Hello, for three weeks I have noticed that the fan of my power source does not turn on the RGB, even with the DPS G program installed in version 3.1.6. Today after turning on the computer I came across the following message "the fan speed of power supply operates abnormally. Please make sure your power supply fan is still working" I rebooted the computer, and the message disappeared although the RGB of the power supply does not turn on !!! Can anybody help me? remembering that the model of my source is the iRGB PLUS 1250W Titanium