[Q] Nexus 7 stuck on boot screen. - Nexus 7 Q&A, Help & Troubleshooting

Hello guys,
I just want to know why this happened? Help me if you have any idea.
I was just using google plus. After I have completed I turned off the Wifi from Power control widget. Accidentally I just turned on the Bluetooth in the widget. Suddenly it went back to the 'X' logo screen. It was stuck there. I googled and found factory reset to be a solution. I went to the bootloader menu, turned the device off, turned it back on, went to the bootloader and did factory reset. Fortunately it started back. And unfortunately the apps were not synced through my account i.e I will have to start as if I am having a new Nexus in my hand. I am pretty sad now cause all my apps are lost Though my data is backed up in my pc. Btw, I was running unrooted stock android 4.1.2. I never messed with OS stuffs because I was afraid to. But still it happened to me. Any idea why?

You've lost all your apps and your settings because you did a factory reset...

n7
feluda97 said:
Hello guys,
I just want to know why this happened? Help me if you have any idea.
I was just using google plus. After I have completed I turned off the Wifi from Power control widget. Accidentally I just turned on the Bluetooth in the widget. Suddenly it went back to the 'X' logo screen. It was stuck there. I googled and found factory reset to be a solution. I went to the bootloader menu, turned the device off, turned it back on, went to the bootloader and did factory reset. Fortunately it started back. And unfortunately the apps were not synced through my account i.e I will have to start as if I am having a new Nexus in my hand. I am pretty sad now cause all my apps are lost Though my data is backed up in my pc. Btw, I was running unrooted stock android 4.1.2. I never messed with OS stuffs because I was afraid to. But still it happened to me. Any idea why?
Click to expand...
Click to collapse
Sometimes our devices have moments it dosent always mean something is wrong and it could have been anything that triggered it to bootloop

Related

Phone crash after battery died!!

my battery was running low, (and coz poor battery issues with JPY), i didnt notice when it switched of. normally i use the power button to turn the screen on to unlock, but instead i realised the phone had been off as it was now booting up...it booted up fine went into the homescreen and then vibrated once and powered down.......now it was powering down for a long time and occasionally there were vibrations and the lights on the home keys were constantly on. the screen was black. i got home and tried to charge it but the progress bar showed no progress on charging, i tried to switch it on but it would go to startup screen vibrate cupla times and power down. so eventually had to do a hard reset in recovery mode. tried every option but in the end had todo it by wiping data.
now the thing is, is this supposed to happen? if ur battery suddenly losses power ur whole fone will screw up?
for future ref if ur battery dies dont try to switch ur fone on until u got some charge in it and use the home key to put screen on..
Sounds like it could have been faulty firmware .
JPY does not have a significant battery drain problem per se .
jje
Black screen, vibrations and no boot after restart
Hello! I had almost the same experience (Black screen after reboot and occasional vibrations) only mine refused to boot even after memory wipe and after flashing new roms.
Was your phone rooted? Because I think rooting a 2.2.1 rom (XWJS3) was the beginning of my nightmare. keep in mind that the phone was working like charm for two months. This was the second time I had a problem. The first time the phone started after performing a factory reset by itself!
In case this happens to you next time and for every non experienced galaxy player (like me) reading this:
Don't panic! Blank screen, vibrations and no boot doesn't necessarily mean a hardware problem. Finally I managed to fix it flashing eclair and repartitioning with pit512. Now I'm a happy XWJS8 user
And a question for the experts: Any clue why this happened? Is it really a rooting issue? Can a cheap Chinese battery from ebay cause this?
everything was stock on mine, no root.......maybe thats why i could recover it??!!
Maybe! and I hope the reason is faulty firmware as JJEgan says. If this is true, your phone will be fixed by the next update.
I was very urge... the same happened again. It's been a month of smooth functioning and now after a simple restart, the device doesn't boot for absolutely no reason (Stuck on black screen constantly vibrating). Since my phone wasn't rooted, and I haven't seen many people talking about a problem like this I suspect:
1. Faulty hardware (for a few devices including yours and mine)
2. A Bad app.
Contacts Vanished
Hey Everyone
Im having similar problems, i updated my sgs to the js7 version of froyo, then rooted it with oneclick method. this was as i got the phone a month ago. Its been smooth sailing since then. But last night the phone powered down and wen it loaded up it had no contacts, my sms where still there but all the apps had a force close issue none worked. so cleared the cache in recovery. Still nothing so i did a factory reset and once loaded up. i formatted the sd and internal within the settings option. So the phone was now clean. I then connected to pc luckily had backups so installed titanium restored all my apps n settings. Using kies restored my contacts n thanks to an app called sms backup i restored those.
So all was well and worked again. I didnt restore the apps i had installed within the last week to make sure it was not a faulty app. I was happy, but now tonight it did it again. No contacts again.
Pls help
Any suggestions
That's exactly how it started for me. One month after rooting froyo 2.2.1 Suddenly everything force closes and the device hard resets by itself. I reinstall all the apps and then after one month and performing a simple restart, it refuses to boot. Stays in a black screen and vibrates every some seconds. I flash a new rom but does the same. Problem solved after repartitiong and flashing original eclair with pit 512. Reflashed a 2.2.1 rom and everything works perfect (the phone now is unrooted and with a nice clear stock rom). But then after one month again (!) I realise that some videos refuse to play. Trying to restart and craaash. black screen, vibrations and no boot. Did the same again (repartitioning and flashing) and now I wait for another month to pass and lose an hour of my life to do the same again. No idea why this is happening. Is it possible that rooting messes with something that stays faulty after restoring the file system? is there an app that we all installed and caused this mess? please this is the most serious problem I've red in this forum and still a mystery. I believe this thread should be sticky and we all share similar experiences because this looks completely random!
I believe this thread should be sticky and we all share similar experiences because this looks completely random![/QUOTE]
+ 1

Help! The process android.process.acore has stopped unexpectedly?

Ive read other threads about this but non seem to address how to fix this issue if you cant even get into your phone. As soon as I unlock my phone I get this message, I cant get to the settings, contacts, or anything? Is their a mode I can boot in besides doing a factory reset? Any ideas will be helpful.
This happened last night after I got off the phone with my girl, I remember she hung up, but I didnt, meaning I didnt press the hang up button, but the call seem to have disconnected. I go to bed, a little while later I go to look at my phone and notice that its on the Dell logo screen you see when it boots up? So I took the battery out, since I didnt feel like getting up and turning on the lights, I left the battery out over night; get up this morning, put the battery back in and bam, I get this message.
Geeksta, I had to do aa factory reset to clear it up. Still never read anywhere what causethat intermitted annoying message loop to begin with. My guess is some android process got changed and it require updating the os or factory reset to get it restored. Are you on the latest version or do you have a pending android update?
how can i make a backup before i do a factory reset. I cannot go in my dell, so i hav to make a backup from the pc?
The process android.process.acore has stopped unexpectedly, this always jumps up the screen before i can do anything.
anyone an idea?..phone is not workable at the moment.
Last official rom.
Are you able to get into Streakmod Recovery & do a nandroid backup?
Sent from White SuperStreak using XDA Premium

[Q] rebooting

My Asus Transformer wont stop rebooting and when I turn it off, it takes me countless times to hit the power on/off button to turn it on, then it just randomly reboots every time I am connected to the internet. I have not rooted my device nor have I done anything to affect its stock state, any help at all would be much appreciated!!
I always have to hold my power button for a few second to boot it from a completely off state... Are you doing that? Or just quick pressing it?
As for the rebooting issue, since you are completely stock with out root, then I would start by uninstalling any recent apps. maybe if you remember what new apps were installed around the time the issues began... I would start there. otherwise, factory reset and see if that helps... Beyond that, i'm not sure what you can do with a stock non rooted device. good luck
Sent from my SAMSUNG-SGH-I997 using XDA App
I have managed to do a factory reset, and no apps were present, yet still when I went to the browser it rebooted and now I am struggling to turn it on, after the first lock screen, it reboots again. Yes, I am also holding the power button untill the screen glows. Thanks for the quick reply!
If a factory reset does not fix it, then back up any important data and get on the phone with asus to do a warranty repair (assuming you are past the return date from where you bought it)
I have returned the device and am getting a new one in a few hours. I hve done some research and i understood that the new firmware update does that to the transformer 101. Can anyone confirm that? Or am I safe to update the new device which i will recive? Thanks!

Help with troubleshooting - bootloop, calls restarting phone, wifi won't turn on

I've been having some problems with my Galaxy S5 recently after ~2 years and some change of owning it. I'm stock rooted on the original ANCG KitKat version.
The problem: If I power off my phone, it will cause it to go into a bootloop, not going past the first screen (Samsung Galaxy S5, powered by android). I haven't found a reliable way to fix it from the loop, but I usually just remove the battery, wait, and try again until somehow it just works and boots up. This is extremely problematic because sometimes my battery runs out and after charging I'll have to go through this game of chance again until my phone works.
The next problem also adds to this frustration as well. When I attempt to pick up a call, my phone will sometimes just not work and restart itself. This leads to lots of confusion and I can't call them back for some time because the phone is stuck in a bootloop.
In the few times that I do get my phone to actually boot up, everything works fine except sometimes my Wifi just doesn't work. It gets stuck on "turning on" where the notification drawer quick setting icon is dim green and never gets to the turned on full green state, eventually just turning itself off (no green color).
I haven't done a factory reset or any real troubleshooting yet, as I'm a bit worried I won't even be able to boot up the phone and I don't have the time yet to spend a full day fixing it. Any help would be appreciated, thanks!
The calling problem may be caused by the google dialer app not being set as the the default phone app but as for the other issues i have no idea a factory reset is a good start though
unfortunately I had the same problem but I have marshmallow but the factory reset helped with the not booting up and see a big difference with the battery

Strange instances of multiple reboots!

This is really starting to get on my nerves now. Ever since I got my new S10+ from AT&T, it's occasionally done this thing where after I reboot the phone, I unlock it, and it briefly says "starting phone" on the home screen, and then will mysteriously do a quick reset, where it skips the AT&T logo and jingle, and just shows the Samsung splash screen , then takes me back to the lockscreen and it's usually fine after that.
However, Just now I decided to reset my phone, like one should do periodically, and it did the strange double reset after unlocking... Then when I unlocked it, after the "starting phone" message I tried to open a browser, and BAM! Quick reset again! Unlocked, let it start up, tried to open an app, BAM quick reset again after the screen briefly shifted from landscape to portrait mode (even though I was still holding it long ways in landscape position). Its never done this before and I'm getting concerned. It's never randomly reset while using the phone, this only happens right after a reset.
Any ideas? I've already tried wiping partition cache after big updates, doing soft resets. I'm worried that I'm going to have to end up resorting to a factory wipe, as others suggested I do when I was having battery drain issues on the ASD3 firmware, possibly because of restoring everything from a backup of my last phone when I got this one. Because supposedly restoring from backups from AT&T, Google or Samsung has caused all sorts of problems for people. I really don't want go wipe everything and spend hours try to get it all back on here manually if i don't have to.
SinisterDev said:
This is really starting to get on my nerves now. Ever since I got my new S10+ from AT&T, it's occasionally done this thing where after I reboot the phone, I unlock it, and it briefly says "starting phone" on the home screen, and then will mysteriously do a quick reset, where it skips the AT&T logo and jingle, and just shows the Samsung splash screen , then takes me back to the lockscreen and it's usually fine after that.
However, Just now I decided to reset my phone, like one should do periodically, and it did the strange double reset after unlocking... Then when I unlocked it, after the "starting phone" message I tried to open a browser, and BAM! Quick reset again! Unlocked, let it start up, tried to open an app, BAM quick reset again after the screen briefly shifted from landscape to portrait mode (even though I was still holding it long ways in landscape position). Its never done this before and I'm getting concerned. It's never randomly reset while using the phone, this only happens right after a reset.
Any ideas? I've already tried wiping partition cache after big updates, doing soft resets. I'm worried that I'm going to have to end up resorting to a factory wipe, as others suggested I do when I was having battery drain issues on the ASD3 firmware, possibly because of restoring everything from a backup of my last phone when I got this one. Because supposedly restoring from backups from AT&T, Google or Samsung has caused all sorts of problems for people. I really don't want go wipe everything and spend hours try to get it all back on here manually if i don't have to.
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Click to collapse
Had an issue with this early on but seems to have been fixed at some point, I'm I'm exynos though so probably not much help!
mtm1401 said:
Had an issue with this early on but seems to have been fixed at some point, I'm I'm exynos though so probably not much help!
Click to expand...
Click to collapse
Dang... So it does appear to be an issue experienced on both Exynos and Snapdragon variants. I wonder if there is or will be a fix for this. I've been asking around and haven't gotten many responses about this problem at all. I'm concerned because it seems to be getting worse than when I first got the phone.
I'm having the exact same problem. Sometimes it goes through quick reset, full reset, a couple more quick, then back to the Verizon logo, then starts up. Opening an app at that point usually does another quick, then full, then everything works. Glad I'm not the only one, but I haven't found any solutions either.
macmanui said:
I'm having the exact same problem. Sometimes it goes through quick reset, full reset, a couple more quick, then back to the Verizon logo, then starts up. Opening an app at that point usually does another quick, then full, then everything works. Glad I'm not the only one, but I haven't found any solutions either.
Click to expand...
Click to collapse
Mine does the same. Unlocked bought directly from Samsung. I don't reboot the phone very often so it doesn't bother me that much.

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