The device also has the ability to automatically enter “Deep Standby” whenever the wired and wireless network connections are removed for more than 60 minutes in Quick Start Mode. Status LED will turn off during Deep Standby.

To “wake” a HEOS device from Deep Standby, you must press the power button on the remote control unit which will immediately turn on status LED.
The Device may need to "find" the network before it can operate properly.

NOTE

Please note that the HEOS cannot be operated as intended when in Deep Standby as there is no network connection.

Press and hold the Power button on the remote control unit for more than 3 seconds to switch to Deep Standby.