Under normal circumstances your Naim Music Server should not be simply turned off via the rear panel switch Instead to power down your Naim Music Server you should press and hold the standby button on the front of the unit (HDX and NS0x) or touch and hold the Naim logo (UnitiServe) until the LED illumination of the button or logo begins to flash; the unit will then shut itself down a process that can take several minutes. When the unit has shut down then the front panel logo will be extinguished and the rear panel power switch can be turned off.