I'm not very well versed with tablets/smart phones unfortunately, so I'm hoping one of you will take the time to answer what I'm sure is a very simple question! I just picked up a Samsund Galaxy Tab 4 (8 inch screen). Love it so far. However, it never seems to want to go into 'sleep' mode. For instance, I changed the 'timeout' setting to 15 seconds, the screen blacks out after 15 seconds and then opens again and goes into Samung's presentation of the tab and all it's basic functions....the size of it, weight, dimensions of the bezel, etc. This uses battery life and it doesn't seem to want to shut down. I tried using an alarm app to wake me today and the tablet was dead this morning due to it's being on all night! How can I get rid of this silly presentation and just have it go into sleep mode so the battery is conserved? Thanks for your time!