Chapter 1 5LCD TV OverviewA general introduction to Acer LCD TV ports, functions and indicators.AT3720A/AT3720B/AT3720 Front panle viewThe panel view below is for AT3720A/AT3720B/AT3720.# Item Description1 Power On/Off Power on or off the LCD TV.2 Menu key Turn s the OSD menu On and OFF.3 Channel up/down Channel up: When the OSD is on, functions the same as the Uparrow.Channel down: When the OSD is on, functions the same as theDown arrow.4 Volume +/- Volume up: When the OSD is on, functions the same as the Rightarrow.Volume down: When the OSD is on, functions the same as the Leftarrow.5 Input key When is OSD is on, press this button to confirm selection.12345