Does anyone know how to turn off the blue backlight permanently on the DCM-580, I have turned it off using the + button on the preset in standby. But it only stays off while the unit is on, as soon as I turn it on againg it reverts back to the light being on. Is there anyway to turn it off permanently???? The sound also comes on really loud, after the unit has been on standby, this is very very annoying!!!