[Q] Nexus 4 Stuck in Bootloop - Nexus 4 Q&A, Help & Troubleshooting

Hey guys,
My Nexus 4 (in previously perfect working condition!) was rooted with an unlocked bootloader. It was still running stock Android. Then, purely out of the blue, I couldn't start my phone. It would get stuck in the four bouncing circles after the Google logo. After waiting a few hours, I tried again. Failed again. Then I used Wug's toolkit to flash stock 4.4.4 and unroot. Immediately trying to start the device didn't work, but a few hours later it booted up successfully. This went on for a few days till it happened again - I accidentally let it turn off and it wasn't booting. After waiting several hours, it began to work again. Then last night, I accidentally turned it off again. The boot failed once again. In the morning, I tried again. Failed. I tried again throughout the day, and it repeatedly failed. I then reflashed 4.4.4, but it failed to boot. I'm looking for a solution - any explanation or reason this would suddenly crop up or what i can do to fix it.
Notes: Under Wug's toolkit, I did select the soft brick option. When my phone was on, it worked perfectly. No particular event triggered this problem, it happened in what seems like a completely random fashion.

avpatel said:
Hey guys,
My Nexus 4 (in previously perfect working condition!) was rooted with an unlocked bootloader. It was still running stock Android. Then, purely out of the blue, I couldn't start my phone. It would get stuck in the four bouncing circles after the Google logo. After waiting a few hours, I tried again. Failed again. Then I used Wug's toolkit to flash stock 4.4.4 and unroot. Immediately trying to start the device didn't work, but a few hours later it booted up successfully. This went on for a few days till it happened again - I accidentally let it turn off and it wasn't booting. After waiting several hours, it began to work again. Then last night, I accidentally turned it off again. The boot failed once again. In the morning, I tried again. Failed. I tried again throughout the day, and it repeatedly failed. I then reflashed 4.4.4, but it failed to boot. I'm looking for a solution - any explanation or reason this would suddenly crop up or what i can do to fix it.
Notes: Under Wug's toolkit, I did select the soft brick option. When my phone was on, it worked perfectly. No particular event triggered this problem, it happened in what seems like a completely random fashion.
Click to expand...
Click to collapse
The exact same thing happened to me, i finally flashed 4.2.2. it booted, but then my IMEI disappeared and i couldnt make any calls. It was completely random. It is possible that the same thing is happening to you. If that is the case, the only fix I know is to change the board.
if you can flash CWM or TWRP, try wiping the system files and then flashing a rom to see what happens.

What do you mean change the board?
And for the rest of the suggestions I'd really appreciate a bit of an explanation - I'm not terribly experienced with messing with Android;

Well I did some research and I flashed TWRP, wiped system and data. I then flashed 4.4.4, but it didn't boot. I'll try to turn it on again tomorrow.

^^On stock 4.2.2, does your phone have an imei number? If not, you will need to send the phone to LG for repair.

avpatel said:
Hey guys,
My Nexus 4 (in previously perfect working condition!) was rooted with an unlocked bootloader. It was still running stock Android. Then, purely out of the blue, I couldn't start my phone. It would get stuck in the four bouncing circles after the Google logo. After waiting a few hours, I tried again. Failed again. Then I used Wug's toolkit to flash stock 4.4.4 and unroot. Immediately trying to start the device didn't work, but a few hours later it booted up successfully. This went on for a few days till it happened again - I accidentally let it turn off and it wasn't booting. After waiting several hours, it began to work again. Then last night, I accidentally turned it off again. The boot failed once again. In the morning, I tried again. Failed. I tried again throughout the day, and it repeatedly failed. I then reflashed 4.4.4, but it failed to boot. I'm looking for a solution - any explanation or reason this would suddenly crop up or what i can do to fix it.
Notes: Under Wug's toolkit, I did select the soft brick option. When my phone was on, it worked perfectly. No particular event triggered this problem, it happened in what seems like a completely random fashion.
Click to expand...
Click to collapse
Did you wipe the system cache and dalvik cache BEFORE AND AFTER flashing a zip?
I've seen many instances of an unsucessful boot becuase the cache wasn't cleared AFTER flashing the zip.
If it still doesn't work I'd recommend you to redownload the system zip from the factory image site.

Related

[Q] Fastboot flashing stock didn't fix bootloop?

TL;DR: I have flashed the stock 4.2.1 image through fastboot, and yet my n7 wifi still reboots continuously at the google screen with the little unlocked lock.
Background: I have had the device for about 3 months, no real problems with it before this. I was reading yesterday night and i fell asleep, and thus instead of being on my desk all night the device was under a blanket. When i woke up, I opened the cover and found it on the google screen with the lock. It was warm, but not incredibly so. I thought it was weird that it had rebooted and apparently frozen, but i held down the power to turn it off. when i turned it back on, it started the google screen, then went black, then started the google screen again. Seems like there may be some sort of a kernel issue that is keeping it from booting. The next thing i did was to go into recovery (had CWM at this point, and it was rooted as well but that's a moot point if i can't get into the system.) and i did a backup, then wiped data and did a restore from the backup that i had just made. after rebooting, it made it all the way into the system, and seemed ok. I set it down, and a few moments later it turned off and started doing the loopy google screen thing again. Next, I went into recovery and wiped data/factory reset, and tried to boot up. no luck, still looping. Next, i grabbed the 4.0 toolkit from the dev section and tried to flash the stock recovery from that, but it was proving troublesome so i just downloaded the image myself and fastbooted then replaced cwm with the stock recovery, wiped everything, and flashed the 4.2.1 image. that should have worked, from what i understand, but no, still being loopy. I re-wiped and flashed, tried 4.1.2 instead, that didn't work, and i re-did 4.2.1. after flashing 4.2.1 and then leaving it boot looping for a little while, i noticed that it sometimes made it into the boot animation and then the animation froze and it rebooted and looped more. after a few more tries, powering it off, leaving it for a few min, and powering it on again, it booted all the way to the welcome screen to pick a language and then froze. some number of loops later, it made it all the way to picking a wifi network and froze. I have yet to make it past that point. Thinking it may help, i fastbooted CWM onto the device, so i have a more capable recovery now. I am now going to look into pushing a non stock rom to the device to see if that will help at all.
Any ideas on what on earth could have caused this? Was it just that the device was a little warmer than usual for a while?
Any ideas on how i can fix this? Much appreciated!
Lastly, should i consider looking at sending it back to google? I didn't think there was anything wrong with the hardware, but i'm not sure.
Thanks!
Update: After leaving the system repeating it's loopy boot thing for about 45 min, it seems to have finally booted into the system, and has yet to reboot again. I have no idea why this happened in the first case, nor why this finally worked in the end, but so far it seems ok.
More: Ok, so it still seems to be looping a lot. I have no idea why still. I'm having trouble getting it to boot back into the system, so hopefully something helps fix this.
Ok, so a day later it seems to have settled down such that there's very little looping on the google logo screen any more; now it just tends to randomly reboot when in use. this is quite frustrating, but seems more similar to what others have reported to be the case with 4.2.1. oddly, i never had these reboot issues before it decided to fail the first time, so i'm not sure if this is just because ii'm on 4.2.1. I may look at flashing back to 4.1.2 and staying there, i suppose it can't hurt. does anyone else have any ideas as to what could be going on?

[Q] Persistent bootloops

Hi folks.
So after a sleepless night and a lot of guessing and clicking around with no luck, I finally decided to ask for help.
The story:
Yesterday, I decided to open up my lovely N4 to perform the thermal pad mod (that can be found on these forums), as it was going really hot around the CPU at time and it seemed like a good solution.
Now, I'm no stranger to disassembling microelectronics without breaking them (few weeks ago, I successfully resoldered a broken power button in my old T989 that I've been using before N4).
What couldn't let me sleep at night:
And here is where the problem emerged. After re-assembling my sweet little phone (yes, i did it perfectly right), I tried to boot up and all i could see was an endless and really annoying bootloop, but as the device booted up, I did not worry much. While doing some research, I read that there's people experiencing bootloops with 4.3, so I thought that after disconnecting the battery, it just might've had happened on its own (I was using stock 4.3 with faux kernel before the nightmare started)
At this point, I booted into recovery and tried to flash the rom over, but unfortunately nothing positive happened. Then I tried factory reset and flashing different roms, also with no luck. This is when things started to get really frustrating, as no matter what I flashed, the bootloop was (and is) still there. But then I tries to restore a backup that I did right after getting my N4, back in November, and it WORKED. Why do i still have a problem then? Because it was 4.1 and OTA was giving me error every time I wanted to flash the update, so I kept flashing till i get some results. And then one of the N4 toolkits wiped my entire internal memory and I ended up with only being able to use sideload. Then I tried ALL of the N4 toolkits that can be found in here, to wipe everything and bring my phone back to everything stock, but the bootloader is locked so it cant do it, and it cant unlock it because I cant boot into the system.
Conclusion:
The phone works fine, and it proved it. But no matter what I try to flash (other than the old backup), the persistent bootloop is still there smiling at me like an a****le.
Any ideas?

Nexus 4 Will Not Boot - Whatever Image is loaded

Hello,
I appreciate there are a huge number of similar questions on this forum, but I have read a lot of them and cannot find a solution to the problem I have with my wife's Nexus 4. Hoping someone will be able to help...
Standard Nexus 4 8GB, running 4.3 OTA on Vodafone UK. Not rooted, unlocked, hacked or anything.
Yesterday it failed to make calls or pick up a network, so my wife shut it down and restarted it; since then it would not get past the X boot logo.
Tried the factory reset / cache wipe steps, many times to no avail.
Let the battery run down overnight, no change this morning.
Sideloaded the OTA from 4.3. to 4.4, accepted the code but would not boot, initially stuck at "Starting Apps" after optimising apps, then after reset stuck at 4.4 Circles logo.
Installed 4.4.2 via fastboot, after unlocked the bootloader, again installed OK but would not boot, as above.
Re-installed 4.3 via fastboot, as above, will not boot.
Now currently gone back to 4.4.2 factory image, still will not boot - sits on the circles boot logo for ever.
I am sure I have tried several different iterations to the above, the furthest I have got it "Starting Apps" screen, most common is X or Circles.
Anything else I can try before giving up?
Thanks in advance.
meepm33p said:
Hello,
I appreciate there are a huge number of similar questions on this forum, but I have read a lot of them and cannot find a solution to the problem I have with my wife's Nexus 4. Hoping someone will be able to help...
Standard Nexus 4 8GB, running 4.3 OTA on Vodafone UK. Not rooted, unlocked, hacked or anything.
Yesterday it failed to make calls or pick up a network, so my wife shut it down and restarted it; since then it would not get past the X boot logo.
Tried the factory reset / cache wipe steps, many times to no avail.
Let the battery run down overnight, no change this morning.
Sideloaded the OTA from 4.3. to 4.4, accepted the code but would not boot, initially stuck at "Starting Apps" after optimising apps, then after reset stuck at 4.4 Circles logo.
Installed 4.4.2 via fastboot, after unlocked the bootloader, again installed OK but would not boot, as above.
Re-installed 4.3 via fastboot, as above, will not boot.
Now currently gone back to 4.4.2 factory image, still will not boot - sits on the circles boot logo for ever.
I am sure I have tried several different iterations to the above, the furthest I have got it "Starting Apps" screen, most common is X or Circles.
Anything else I can try before giving up?
Thanks in advance.
Click to expand...
Click to collapse
Hmm heard of such issues in the past where nexus wont boot with 4.3 or 4.4 !! I dont know the exact reason of the problem but what I do know is a solution for the same !!
Download the Factory Image for 4.2 Jelly Bean and fastboot the same !! Mostly youll get back your phone in the working state albeit without being able to upgrade to 4.3 or 4.4 !! Have a good day ahead !! :good:
Hi,
Thanks for the reply - I have just reloaded 4.2.2 from scratch and it is working. I then tried the OTA 4.3 upgrade and it failed, as before "starting apps" for ever, reset never boots.
Returning to 4.2.2 worked again.
What is strange is that this handset worked with 4.3 for 3 or 4 weeks before the restart yesterday...
I also tried 4.3 with .48 radio but that still failed to boot.
Hopefully someone else has a clever idea or some information around how/why this occurs, as beyond there being an underlying hardware fault (all sensors seem with androsensor) it is not logical.
Thanks.

Stock Nexus 4 Boot Loop

Hi,
I am trying in vain to fix my friend's Nexus 4. She started having problems with a boot loop around the same time as 4.4.3 (I think) but it just went away. Two days ago it came back, possibly around the time of 4.4.4 seeding, however this time it won't go away. I have been looking at threads throughout XDA for help and tried this thread for help. I have a GS4 myself and very little experience with ADB/SDK.
All efforts have failed. As well as the boot loop issue, recovery is broken limiting my options. I tried the "not lose any data" method in the link above but this didn't work. Next the Nexus Root Toolkit, however most of the time the program fails as it says the download failed due to an MD5 mismatch. I have tried downloading the images directly from Google but still no luck - of all the 4.X images available only a couple will even allow me to try and install.
The first install didn't install, I noticed it mentioned the bootloader been locked several times - it recommended 'force flashing' providing I definitely have the right image. Several attempts later I managed to get the install working but it is still stuck on a boot loop (waited at least 15 minutes). Recovery is still broken. The only thing I have been able to do is unlock the bootloader.
So is there any hope? The device is pure stock, no alternative custom recovery or ROMs. Thanks.
I think half the problem is I can't the USB drivers installed properly as the device isn't showing in Device Manager. Without been able to turn on the phone or enable USB Debugging, it won't let me.
EDIT - I tried another toolkit and eventually managed to get 4.2.2 installed. I have just updated the phone to 4.3 but it's been on the Google X screen for a while now
EDIT 2 - Fixed the above. I needed to downgrade the radio. Updating to 4.4 - no doubt I will go through the same hurdles.
EDIT 3 - An error occurred during installation.

Nexus 4 ISSUE

Good day everyone.
I lost my cellphone, so I started using this Nexus 4 that my brother had left, I factory reset it, then started using it, an update came up, around 18MB i guess?
anyways, it worked great for the first 2 weeks, then due to low battery, got turned off, I turned it on and it got stuck at the Boot, restarted a few times and it worked.
same thing happened again, until it started getting stuck at bootloop.
tried factory reset through recovery, it worked once, but then again, once I restarted the phone, it'd be bootlooping.
so I tried flashing the Phone, to 5.0 from 5.1, thinking, it'd solve the issue but it didn't.
Now, the cellphone, is i guess, bricked or something? I'm new to all these.
any solutions?
TL;DR
Flashed Nexus 4 - Stops at Bootloop, no matter I try to factoy reset it, or flash it or anything.
is there any chance it'd be fixed or is the phone done?

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