Vizio E400i-B2 - User Manual - Manual (Page 15)

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FRONT PANEL
REMOTE SENSOR & POWER INDICATOR
When using the remote, aim it directly at this sensor.
The power indicator flashes on when the TV turns on, then goes out after several seconds.
To keep the power indicator on as long as the TV is on, see Turning the Power Indicator On
or Off on page 48.
FRONT PANEL