Help Screen wont light up, except after restart. I suspect hardware issue

[steelcase]

Hello mates.

My tab wont light up after resting, and the weird thing is that it works fine after restart. The only thing that doesnt seem to work is the adjustable screen brightness (and thats a pain in the butt). I did a factory reset and the problem persists. I have no problem opening it up, but im not sure what to look for.

If anyone here have a clue of what it might be, id be very grateful. Thanks