I had the same problem with continuous rebooting. The problem seems to be a sticky power switch, as others have suggested. I didn't want to take my tab apart to disconnect & reconnect the power switch, so I just thumped the back by the power switch to unstick it. That fixed it and it booted normally afterwards! No data wipe, no factory reset, no repair center, just a few quick thumps to the back under the power switch!! Good luck!