Help My tablet is dead?

[Lalaru]

I have not used it for awhile, maybe a month or so. Decided to finally charge it up, and at first it began flashing just a black screen. Like, it would go from totally off, to being on, but only a black lit backscreen. I didn't notice for awhile, but when I did I unplugged it, and plugged it back in again. Well, it started turning itself on and off, then it actually made a noise akin to TV static, before blacking out. I checked on it again, and this popped up... (Oh I can't post photos. Great!)

A "Start" screen with an image of the Android with it's chest open, and buttons inside, something about product name - grouper, idk.

I turned it on again, it went on, but it said it had no battery, etc., and black out. I tried again in about 30 mins, and it went totally crazy on me, black screen with just moving pixels everywhere.

I mean what in the fresh heck went wrong here? Now I unplugged it, as the screen is lit, but totally black, and not turning on (or OFF for that matter). What the?

 

[El Presidente]

What was %age was the battery at before you left it for a month? Could be the battery is completely flat? Where was it stored whilst it was off? Somewhere dry?

Leave it to charge for a couple of hours, see if that makes a difference.

BTW, if you want to post a pic, you should be able to do that now.

 

[n4zty]

What was %age was the battery at before you left it for a month? Could be the battery is completely flat? Where was it stored whilst it was off? Somewhere dry?

Leave it to charge for a couple of hours, see if that makes a difference.

BTW, if you want to post a pic, you should be able to do that now.

starting to noticed a nasty trend here with n7 devices not wanting to turn on after being discharged completly eh boss?

 

[El Presidente]

Kinda.

You should let any device with a Lithium battery go completely flat though, once they run out of charge completely, it's pretty hard (sometimes impossible) to kick them back into life again.

Also worth noting that even though the device is turned off, it will still lose charge very slowly.

 

[n4zty]

i take it they are going to do something about the battery? thanks about heads up about the battery i use my tablet almost everyday i suppose i will have to be extra cautious about letting it drain completely. so to better understand the issue why once a lithium battery is drained it cant be recharged again?

 

[John Bean]

From the Wikipedia entry about lithium batteries:

"If overheated or overcharged, Li-ion batteries may suffer thermal runaway and cell rupture. In extreme cases this can lead to combustion. Deep discharge may short-circuit the cell, in which case recharging would be unsafe. To reduce these risks, Lithium-ion battery packs contain fail-safe circuitry that shuts down the battery when its voltage is outside the safe range of 3–4.2 V per cell. When stored for long periods the small current draw of the protection circuitry itself may drain the battery below its shut down voltage; normal chargers are then ineffective."

It's not really a Nexus 7 issue in the sense that it can and does effect any Li-Ion battery if stored in an uncharged condition, which is simply bad practice.

 

[Lalaru]

Well darn! No one ever told me that, I don't think it is something the average consumer is generally aware of. I guess it's gone forever~ lame. Guess I'll have to get a new tablet, oh well. Maybe an iPad mini? < thanks everyone~

 

[El Presidente]

Maybe an iPad mini? < thanks everyone~

Your choice, just don't let it discharge too far

 

[Lalaru]

Your choice, just don't let it discharge too far

Oh, oh! I tried this with my charger plugged into a different outlet, and now my tablet has a normal charging battery screen. Woot~ I think it's still aliiiive! Haha roud:

 

[John Bean]

Excellent! Now the trick is to remember to charge it before letting it collect dust for another month... ;-)

 

[Ridethesplit]

my sons nexus 7 is now dead too!
wont switch on at all.
read all the threads about holding various buttons etc, to no avail.
really not happy.

 

[dan330]

my sons nexus 7 is now dead too!
wont switch on at all.
read all the threads about holding various buttons etc, to no avail.
really not happy.

how did it go dead???

 

[lucky013]

You tried volume down the and power? Then off? I etc?

 

[Ridethesplit]

Yep, nothing.
Been on charge all night so lets see how it goes today!

 

[taz92]

My tablet did the same thing this morning. I let it shutdown on me due to dead battery. I tried charging it and it wouldn't turn on for nothing. Finally I just pressed and held the power button for 15 to 20 secs and eventually the Google screen showed and it booted after 45 minutes of charging.

 

[doodah65]

Hi,

Mine died last week. Tried all of the tricks that I could Google up to get it working again but no luck. Took it back to the shop where I bought it and was told it will be 4-6 weeks to get if fixed or replaced as it was over 21 days old. The shop had another 4 in the same state that people had returned that week.

There seems to be a lot of issues with Nexus 7 dying, Google really ought to replace them quickly. Mine was only just over a month old.

 

[n4zty]

Hi,

Mine died last week. Tried all of the tricks that I could Google up to get it working again but no luck. Took it back to the shop where I bought it and was told it will be 4-6 weeks to get if fixed or replaced as it was over 21 days old. The shop had another 4 in the same state that people had returned that week.

There seems to be a lot of issues with Nexus 7 dying, Google really ought to replace them quickly. Mine was only just over a month old.

Kelrmar old af veteran staff member told me he left his charging for 36 hours and it finally started to charged not sure if u guys have tried that.

 

[John Bean]

Kelrmar old af veteran staff member told me he left his charging for 36 hours and it finally started to charged not sure if u guys have tried that.

That makes sense. If the battery has dropped below safe normal charge voltage it looks like Google have done the sensible thing by applying a tiny - safe - charge current to the "dead" battery to see if it can revive it. If the battery is not really dead it will eventually reach a normal low/flat voltage from where it can be recharged normally without danger of overheating. If it never recovers the tiny charge current is presumably incapable of risking overheating (and sometimes fire) that can result from trying to charge a lithium battery from deep discharge voltages.

Best practice with li-ion is never, ever discharge them completely - then this issue doesn't arise.

 

[androidpod]

The best practice as suggested by many experts on this type of battery is to store it at approx 50% charge if its not going to be used for a period of time. It's true that for the overall life span of the battery, it's good to try & avoid total discharge.

Contrary to many of the comments floating around, allowing your battery to go dead will _not_ create the problem of the phone refusing to boot. Yet because many who experience the problem do so, with dead batteries they assume its related.

The real problem is that there is something wrong with the Nexus 7's that won't reboot on either a low, or dead battery. This has been acknowledged in a rather evasive way by Samsung. I know, I spoke to one of the top tier tech specialists recently.

My Nexus 7 failed to boot when there was still a 45% charge remaining in the battery. That's neither dead or very low for that matter. Yet it happens regularly & the only way I have experienced it recovering to boot and operate properly is so random I haven't determined what has worked.

Sometimes I hold all volume & power button down for up to one full minute before it responds. Other times 30 seconds or less. Yet this practice is only one of several I've tried. At times nothing works.

Hopefully ASUS / Samsung will address & issue a fix before too long.

 

[A.Nonymous]

Well, mine is now dead too after I let it discharge completely. I am beyond ticked. This thing is 6 mos old and now it's completely dead because the battery went to 0? This is beyond ridiculous. Holding the power button down does nothing for me and plugging it in makes the backlight come on, but that's it. It's completely dead. I am ticked off enough that I may not buy an ASUS product again for a long time.