the same thing happens to me. i tried doing what you said and so many other things. I don't know what else to do . please help!!!!
I turned it off as usual, I left it charging all night. I woke up, turned it back on and these BLUE BOXES keep on appearing on the lock screen, and the screen DOESN'T WORK at all, so I can't go to settings. Only the home and volume buttons work.
I also tried pressing the volume and home button, the volume and lock button, both volume and home button, all the 4 buttons, I removed my sim card as well and rebooted it. Nothing.
Please I need your help