If you are having trouble turning the panel on or have noticed it needs to be manually powered on, please see below for ZHIHITFHD6516 Hitachi Interactive Touchscreen:
For the new model HITFHD6516 Touch C, it is required to be manually powered on.
To power on the unit you would need to press the INPUT select button and the osd will come up.
Choose the correct input and then press OK to select the right input.
This is the normal process to turn on the panel.