@bornach @haeckerfelix If it is the piston, then "shorting" the lower cylinder with the actual piston (uipper portion) by soldering a wire between both would prevent static generation when the piston rubs against the cylinder.
If there is static discharge, far more dangerous than blanking your screen from time to time is zapping your keyboard when you touch it, or if wired keyboard, zapping your RAM or CPU chips.