HI Team,
Have a problem with my power management preferences. Even if I have option to not dim, my screen dimmed after some time (10 minutes or so). Any idea where to find more options or solutions?
Look at xset command.
xset q
will show current settings. Look at DPMS.
Seems enabled as per below. So now, how to disable this? somewhere in xorg?
See the xset manual:
man xset
What do you want to achieve?
To disable screensaver:
xset s noblank;xset s 0 0;xset s off
To turn off DPMS:
xset -dpms
Experiment with it a little bit 
Then when you happy with settings you may add them to ~/.config/openbox/autostart
Thank you. I’ve added to my autostart config.