Hi atleastsixcharacters,

welcome to the Sony User Community Forum..

Not a dumb question I have a similar issue with a decoder box, looking at the manual there is reference to  your device automatically switching to Power Saving Mode, so I wondered does the fan still sound when your device is in power saving mode??

To answer your question from what I can tell there is only the on/standby button, so switching of at the plug would be the only option to stop power reaching the fan, etc..