I have read the manual over & over, read all the forums, asked search in forums and even asked google and have not found the answer in plain English and the exact procedure to have the nexus go into & out of the sleep modes & what happens when it is in sleep modes. Every time I ask this questions it keeps telling about covers that make it sleep and you know what I bought my nexus 7 last week and also the cover at $19 using Google Play & the cover did not have the lid that makes it sleep. Any answers would be appreciated jimjoh