Can anyone offer me advice on the following fault please? I have a Denon
UD-M30 CD/ Radio receiver. When the mains is applied the On-Standby switch
seems to work OK in that it changes from red to green when pressed and
vice-versa. However, the display panel doesn't light up and no controls
work. A possible power supply fault maybe but any advice would be
appreciated. As a last resort does anyone have access to circuit diagram
etc.?

Many thanks.

Gary