A power supply in a controller was working erratically, its display was dimmer than usual and flickery (strobing on and off at 100Hz rate). Its power supply is nominally 15 Volts DC drawwing approximately 0.5 amp continuously. The transformer AC secondary is 12V, being fed into a bridge rectifierand a 2200uF electrolytic capacitor filter. The AC input to thr bridge is measured at 12V, al four diodes in the bridge check ok and the DC from the rectifier is measured with a multimeter to be 10.4V. What is likely to be the fault? What further measurement(s) could you do to affirm your answer? Give reasons to support what you suspect thefult to be.