How do I turn my screen back on, it charges but displays nothing

Ok so at first I looked online found a video says rub it this way and that and tap it all over, I think I popped out my sd and chip and it went back on second time I freaked problem was battery died, now last week I was rubbing it trying to clean of my cases screen while the screen was off while at my daughter bball game, get home. Wont go on, I popped out the chips again, nothing I plug it in for 20mins, nothing. I every so slightly twist it the boot up samsung logo and all that flicker on and off and then nothing, how do I fix it, or should I fork out the cash and get it pro done??