I am troubleshooting a friend's tab. Apparently a few days ago the tablet did a couple of routine updates. Since then the tablet is displaying some weird behavior. It will power on, gets to the home screen then promptly turns itself back off after about 2 seconds. The only way to stop this is to turn the wifi off. If you can do this before the tablet powers down, it seems to resume "normal functioning". The only other weird things are an increase in data usage and the maps app is showing the android icon and when you click on it is says the app is not installed. It seems to me that an update failed or corrupted and she is in some kind of loop. We cleared caches and closed everything we can. Problem returns the minute WiFi is turned back on. She is running 4.0.4. Any ideas?