Roku Elite constantly re-boots, shows dancing "ROKU" splash screen, for 10-20 seconds, then goes dark. 3-4-5 minutes later, repeats, then goes dark, then repeats, etc. Never boots to home screen.
There's no such model as "Elite". What's the model number written on the device? If you're using the TV's USB port and not the supplied power adapter use the supplied power adapter.
3930 LE maybe? (White, Walmart-exclusive Express.)