My laptop screen will go black for <1 sec every once and a while with no discernible pattern. It only happens when running programs on integrated graphics. All programs/audio will continue to play, the screen just turns off. I have used Intel's support tools to fully update the drivers.
That was a big mistake using Intel's drivers. Dell customized Intel's as well as all other manufacturers' drivers for your exact model. Get the original drivers from Dell Downloads and install them.