Before we start, I did this on a raspberry pi 3, there are a lot of solutions, but most of them don’t work on the pi3.

To prevent the pi from going black, I used a little porgam thats called set.

apt-get install x11-xserver-utils

No you have to open the file: /etc/xdg/lxsession/LXDE/autostart,.

Put the following stuff in it:

xset s off # don't activate screensaver
xset -dpms # disable Energy Star features
xset s noblank # don't blank the video device

Possibly also comment out the line that says @xscreensaver -no-splash, so the file should now look like this:

@lxpanel --profile LXDE
@pcmanfm --desktop --profile LXDE
# @xscreensaver -no-splash
xset s off 
xset -dpms 
xset s noblank

As well make sure you did the stuff from the wiki in the /etc/kbd/config. In this file the following values should be set to the following:

BLANK_TIME=0
BLANK_DPMS=off
POWERDOWN_TIME=0

After you did all this, /reboot the pi.

this worked for me… :-)

cheers, Flo