Sent from my Nexus 7 using Tapatalk HD
I am in the process of troubleshooting this issue. I've researched many threads on different forums that have reported "fixes". Most of these "fixes" are anecdotal and are not likely to work for the majority of us. This issue also appears to possibly be multiple, closely-related but distinct issues:
- N7 turns off randomly
- N7 turns off when the battery is low
- N7 won't turn on
This further complicates the landscape.
Since troubleshooting this issue involves running through full battery cycles, it's not something that can be completed in an hour or two. If I can come up with a reliable/repeatable "fix", or at least, helpful info that I learned along the way, I'll probably start a new thread instead of posting under just one of these issues.
Well, just had an interesting development. Maybe it will result in having to crack open the back and re-seating the battery connector - or maybe not.
I was just using my N7 this AM, knowing that the charge was getting on the low side, like 30%. At 23% my N7 went dead and would not turn on. When I supplied power to it, the screen cycled between displaying very slight static, and then going black. Holding the button down did not matter for the first 2 tries. The 3rd try started up just fine. But I wanted to troubleshoot some more...
So I let it go up to 24% and then I disconnected it from power. Without moving it whatsoever, my N7 went dead at 23% a second time. Since my N7 was not touched/moved during this brief time, I believe this dismisses the loose battery connector idea.
I reconnected power and sure enough, it did not respond to holding down the power button for 30 seconds until the third try. Here's what I think...
- I probably don't have a loose battery connector, given the N7 turning off at a specific power level, without being touched/moved.
- The power circuit/program needs to calibrate itself. The battery appears to be running out of power while the N7 thinks there's still 23% left
- When an N7 turns itself off, it may need up to a minute or so before it wants to respond to the extended power button press - mine did not respond the first or second time - only the 3rd time.
- I'll leave it plugged in well past the 100% charge level today, and I'll run it down to zero and watch the power level that the N7 reports. This may take a few cycles to calibrate.
I welcome your ideas - so give me a shout.
I am sharing my experience here, and will post back in the event what I discover might help other N7 owners.
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