Hitachi 42V52 Operating Manual page 56

Set Auto
This function will turn off the TV automatically when a video signal is not detected for 15 minutes.
Power Off
Timers
Set The Clock
Set Sleep Timer
Set Day/Night Timer
Set Event Timer
Set Auto Power Off
Move Select
SEL
Use the CURSOR buttons
Press the SELECT button to select.
NOTE: 1. If "Yes" is selected and no signal is detected in Antenna Mode, "Weak signal or channel not available" will be displayed.
2. If "Yes" is selected and no signal is detected in Video Mode, "No Sync. Signal" will be displayed.
3. If "Yes" is selected and it is 1 minute before the TV turns off automatically, the "OFF 0:01" icon will be displayed.
4. The Auto Power OFF feature will be cancelled when an input change or channel operation is performed.
and to highlight the sub-menu of your choice.
Timers
Set Auto Power Off
Automatic Power Saving
Yes No
or
Select yes to have the TV turn off
Automatically when a video signal
is not detected for 15 minutes.
Move Return
SEL
56
TIMERS