Re: why is my galaxy tablet 3 screen black?
Welcome to Android Central! Is the battery icon at the very top of the screen, or is it a big one in the center? If it's in the center, the device is powered off--press and hold Power to power it on. Sometimes you have to keep it down for a good 10 seconds or so.
If it's at the very top of the screen, and nothing else works, then it's probably frozen. Press and hold the Power button for 10-15 seconds to force a shutdown, wait 10 seconds, then power back on again.