You don't touch any screw, just remove the back cover, then reseat the LCD cable. Actually Samsung tablets are very simple with few screws.
This one has a similar way to remove the back cover as the SM-T580
https://www.youtube.com/watch?v=mpjjiMr7Kr4
The LCD cable is the black one, located along the center of the battery.To avoid a short, battery cable should be disconnected first.
You just need to lift up the locking tab at the top of LCD connector, be careful as it's very fragile, then push the cable all the way in , press down the locking tab and secure it with tape. A simple fix for many Samsung tablets which suddenly have a black screen but having sounds in the back ground.
Without tapes, this LCD cable can get loose easily, even without a drop.