Macbook Pro Retina 2015 Black Screen (Intermittent)

I have had an intermittent black screen issue going on with my MacBook Pro for a few years now. I sent it to Apple for troubleshooting and they could not find the cause. So i have continued to deal with it. Interestingly I made a new distinction that it is not the position of the screen, per se, but instead, the position or tilt of the "base" that causes my screen to light up again. Said another way, if I am just working along----on battery, which seems to be the dominant scenario----and the screen goes dark, I now know that tilting the base up/down on the axis of the screen's hinge brings back the screen immediately. i used to fight it, shake it...tilt screen back and forth....whatever, especially when desperate....and never really figuring out a reliable pattern, until this new observation very recently. I am looking for any evidence of a solid state gyro in the online forums that might be the culprit, but so far have found nothing. I so much like the idea of a gyro-sleep-or-screen-off function being responsible than a loose wire.

Does anyone have any theories why tilting the base up and down (back and forth?) could drive (and recover from) this intermittent black screen issue ?