Sony Wega KE-42MR1 Manual De Instrucciones página 43

Auto Shutoff The "Auto Shutoff" option allows you to set the TV to change to the
standby mode automatically if there is no input signal through the
connected equipment.
To do this:
1 After selecting the option, press .
2 Press or to select On.
Auto Shutoff cannot be set when the TV receives the TV Broadcast signal.
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Menu System