i'm not sure if my nexus 7 is somehow in 'deep sleep' mode or bricked, or D.O.A.... once a couple months ago i had the problem that i had to hard boot it back on by pressing the power button for 30 seconds or so....but over the last several weeks i've noticed the time it takes for it to startup when i push the power button takes longer and longer and i have to push the power button the 30+ seconds more often to get it powered up but usually it powers up and i've not had any major problems with my nexus 7. until today. i can't get it turned on at all. i'd done a factory reset to try to fix some of my powering on issues, changed some of the google currents sync settings to off, then turned the tablet off to go about some other things, came back to it and couldn't get it started up again. i was charged to about 40% so the battery wasn't empty. i know there's a million threads about this out there, i've tried the pushing the power button for 30+ seconds, pushing power + volume up/down button, rebooting with usb plugged into the computer, updating nexus toolkit on laptop...although i can't see what build i have so i don't know if i'm even installing the right drivers...the computer doesn't recognize it as a drive although before i've had it working fine as an external drive.... i did manage to turn it on once somehow but as soon as i powered it off again i can't get it back on. so at least i have a little hope that it's not completely dead and still revivable but i've run out of ideas. nexus 7 32gb, running android 4.2.2 upgrade, unrooted. and yes, i'm always using the original power cable that came with it.