I'm a bit late on parade, but i had the exact same problem with mine. Black screen, wouldn't charge, and showed no signs of any life whatsoever. Very simple fix though…? Pop the back off the tablet. Then your faced with the circuit board and the battery. Disconnect the LCD ribbon from the connector plug on the circuit board. Peel the green tape back and gently ease it out of its socket. Then plug the tablet into the charger and leave it alone for an hour. After an hour, unplug the charger lead, and reconnect the LCD ribbon back into its socket on the circuit board. The vitally important thing to do is make sure that the tiny little plug on the ribbon goes into the socket correctly. There is a white line that runs across the plug, and another white line on the circuit board socket. When you ease the ribbon back into the connector you need to make sure that the two white lines are 100% perfectly in line with each other. If your even the slightest bit out of line, it won’t work. Then once you've plugged the ribbon back in correctly, push the power button down to test it before putting the back casing on. The tablet will come back to life as if by magic. Snap the back cover on again, and plug it back into the charger. It'll work like it did when it was new. If it doesn't work, it will be because you haven't lined the white lines up with each other. So repeat the process again.
My tablet tab a 10.1 was on a fully black screen that wouldn't turn on and off so I used the Home/Power/Volume button and it took me to this screen to tell me to download something so i had to press volume up to download it so i did and it took me to this screen that said "downloading.. Do not turn off target" And on the top left corner it said odin mode So then a tried to use the combination of commands nothing happened and so i left it on the charger while i was asleep and it was still on this screen So i dont know what to do about it
by Jaden Martinez
I did the same
by wayen bumhira
After turn on a power, swipe the screen to he right to unlock the tablet. Then click setting and go to display. You will need to set "Show Apps buttons" on and then add some apps to home screen
by Mila G
my tablet is samsung galaxy tab 4 sm t-530
the screen displays alright but the light is dim, you can’t increase or
decrease the light even if you adjust the increase and decrease buttons.
by richard ossei