You are unable to use the ePoster touch function to disable touch, however there is a workaround to move the touch point from the screen to the HDMI input source.
1. Press Input on the remote control and key in 2580 to enter Admin Mode.
2. Select: Other Options > Ok > Off > Ok.
3. Select: Touch Enable > Ok.
4. Repeatedly press the Exit button on the remote control until you leave the Admin Mode.
5. The touch function will now be disabled.