on 20-08-2013 11:40 AM
Press the "Services" button on your Sky+HD remote control.
Then press the "Down" button twice.
Then keep pressing the "Down" button until Standby Mode is highlighted.
The press either the "Left" or "Right" button until ECO is highlighted.
The press the Green button to save the settings.
on 20-08-2013 12:03 PM
Take your 1st answer as ok but try using your tv control supplied with your tv and click on settings button for picture mode scroll down for eco and click for on which currently might be on off.