I may have been wrong and misread information then. Sorry about that. There is a bug for related to sleep mode I have been reading though. sed to be issues with the device being unable to wake from sleep.
I tried that and a couple of others and no luck. The screen goes blank and none of the buttons will bring it back. I have noticed also that when the tablet screen timesout it does not shut off it just goes down to the lowest backlight setting.
So what I need is an app that just sets the tablet into the locked state.