This post explains how to eliminate the backlight when the Panel PC is in the screensave state.
To know how to install the screensaver in your Panel PC open the following link: Install Screensaver on your Panel PC
Touchberry Pi family product
In order to eliminate the backlight in the screensaver mode you must follow the following steps:
1) Open the Touchberry Pi
2) Make sure there is Internet connection
3) Edit the file: /boot/config.txt adding the following line:
hdmi_blanking = 1
4) Edit the file: ~/.config/lxsession/LXDE-pi/autostart and add the following lines:
@xset s 0 0
@xset s noblank
@xset s noexpose
@xset dpms 0 0 0
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