I don't want my box to go into automatic standby. Received box today, went into standby myself. Later all I could get was "waking up". After 15 mins of this, tried to go back into standby on remote. Nothing happened. Had to switch off with the switch at rear of box, waited, switched back on, after a good 5 mins of "switching on" finally went to Home setting. I understand there have been standby issues so would prefer to just leave on. How do I make sure it does not go into automatic standby after 4 hours? Cannot see how you change power settings.