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Nexus stuck at update screen (droid with polyhedron)

My Nexus 5 seems to get stuck at the update screen (the standing green android with the spinning polyhedron) after flashing to stock(+unroot) with softbrick/bootloop checked. The flash completed without error. I've left it at this screen for over an hour and not only does it not progress it doesn't even get to the progress bar at the bottom.
This afternoon my (unrooted, bootlocked, stock) N5 turned itself off 3 times while on the charger. Powered back on and then would find it turned off 20 or so minutes later when I checked it again. After the third time it booted to the "Google" screen and would go no further. I tried a hard reset but it gave an error. So I plugged it into my laptop and fired up Wug's NRT, unlocked the bootloader (at which point it got stuck at the same update screen described above for around an hour). I held power till it went off, booted back into bootloader (which showed as unlocked) and performed the flash to stock(+unroot) with softbrick/bootloop checked and ended up at the update animation again. Any thoughts other than RMA?
****Edit: Finally got the phone to boot after fastboot booting twrp. Was able to to wipe the phone (after multiple attemps blocked by can not mount storage/cache/etc/etc errors). Flashed 4.4 and the phone now boots to android BUT radio is non-functional (no signal despite being in my normal coverage area), any attempt to add an APN causes a hard reboot (had to go through all the setup screens again). Additionally, the phone won't turn off, even hard power downs (holding the button for 30 secs) lead to an immediate reboot. Still RMAing but I was able to relock the bootloader.

You really shouldn't RMA a phone after messing it up yourself by using a toolkit when you didn't know what you were doing.
Flash the factory images manually. That should get your phone up and running again.

Chromium_ said:
You really shouldn't RMA a phone after messing it up yourself by using a toolkit when you didn't know what you were doing.
Flash the factory images manually. That should get your phone up and running again.
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Performed a manual flash with the exact same results. There is apparently something wrong with the hardware (which may explain why it was turning itself off and then wouldn't boot past the google logo.

gallahad2000 said:
Performed a manual flash with the exact same results. There is apparently something wrong with the hardware (which may explain why it was turning itself off and then wouldn't boot past the google logo.
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Yep, I would agree.

[Q] I have problems with updating lollipop 5.0 in my Nexus 4.

So, my phone was stuck in No Command bootloop. I’ve done the power+volume up and had cleared cache and even done a factory reset. Those did nothing and my phone is still in stuck No Command loop. I think I’ve made it even worse by trying to Flash Recovery and Reboot options in the Nexus Tool Kit because my phone won’t even get to the No Command screen. It just turns on and turns off after Google comes on. Currently it stuck in that loop and only stops once the battery is completely drained. Also i have tried using power + volume up and it doesn't help . Please help

vigneshkumargv said:
So, my phone was stuck in No Command bootloop. I’ve done the power+volume up and had cleared cache and even done a factory reset. Those did nothing and my phone is still in stuck No Command loop. I think I’ve made it even worse by trying to Flash Recovery and Reboot options in the Nexus Tool Kit because my phone won’t even get to the No Command screen. It just turns on and turns off after Google comes on. Currently it stuck in that loop and only stops once the battery is completely drained. Also i have tried using power + volume up and it doesn't help . Please help
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As you've upgraded to lollipop ?? You came from a custom rom ?? Enters the bootloader?

vigneshkumargv said:
So, my phone was stuck in No Command bootloop. I’ve done the power+volume up and had cleared cache and even done a factory reset. Those did nothing and my phone is still in stuck No Command loop. I think I’ve made it even worse by trying to Flash Recovery and Reboot options in the Nexus Tool Kit because my phone won’t even get to the No Command screen. It just turns on and turns off after Google comes on. Currently it stuck in that loop and only stops once the battery is completely drained. Also i have tried using power + volume up and it doesn't help . Please help
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Click to collapse
with wugfresh nexus root toolkit click on the button "soft-bricked"(flash stock + unroot) or something like that to restore the phone. After that try another time to unlock and root with a custom recovery (for example twrp).
When nexus root toolkit installing the original lollipop rom, look the "dos window" to see if the software shows errors, because sometimes the process ends without a real restore.
If you have other problems, please post a screenshot.

Fenix46 said:
As you've upgraded to lollipop ?? You came from a custom rom ?? Enters the bootloader?
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Yes I was using a custom rom, but I not even reached the step where a was supposed to use the rom, I was steel still cleaning the divece.
Here is a photo from the screen I'm stuck in:
eeee.... I'll find a wint to send the photo to this forum ^^" wait

[Completed] Nexus 5 stuck in bootloop, can't enter recovery mode

So today after a doctors appointment i checked my phone to see the time. when i got home my phone was stuck in the google screen. i waited for about one hour as i had to go some place else. when i came home the phone was still in the google screen. at this point i could still go in to recovery mode. i searched a bit on the internet and then flash+unroot from the nexus toolkit from the stock 5.0.1 that i had to the stock 5.1.1 . it still didn't open. i searched some more and I found that i needed to enter recovery mode and wipe everything off. i tried making a backup with the toolkit but it didn't work. then i tried going to recovery mode and it also didn't work. next i tried to flash a 4.4.4 version as i saw it worked from someone but it is stuck at the point "waiting for device" .
i don't know what to do. please help me fast , i need to leave town in 4 days and i don't have time to take it to service and i don't have a back up phone either.
your help would be much appreciated
edit: when i try to enter recovery now the phone shuts completely down
edit2: my nexus toolkit apparently didn't flash properly so atm i have no os on my phone. (it is confimed by a twrp recovey i booted with the nexus toolkit) i am currently struggling to find out how to install and os without recovery mode or toolkit, help would be appreciated
edit 3 : if anyone is reading this, i manage to boot a recovery image but it only shows an android robot with a red exclamation mark, i cant use adb commands, it says device not found, still don't know what to do
if i try to install os with a flash-all.bat it says failed remote flash write failure, same as with the nexus toolkit
if i try to wipe cache from the trwp recovery it says taht i cant mount any partition so i think my memory drive is busted

Hello, thank you for using XDA Assist.
Try asking for help HERE and the Nexus 5 experts will help you there.
My guess is that you need to unlock the bootloader to use the flashall.bat
Have Fun!

"Softbricked" Nexus 5, boots to bootloader but windows won't recognize it.

Hello,
I have an "ex-rooted" nexus 5 that I just yesterday tried factory resetting, however, it won't do that and just stays stuck at erasing for 15-30 minutes before the broken android shows up. Now, when I say ex-rooted I mean that I have either uninstalled supersu with the supersu app, or I've tried just flashed over the old rom. Alas, I have no recovery at all, when I choose recovery from the bootloader the screen goes black and it goes back to try erasing the phone.
I would have just flashed it, but this is where my problem comes in. My phone doesn't show up on my computer at all. I have the right drivers and such, even tried different ports and cables.
Anyone have any ideas? Sorry if I'm ****ty at explaining my problem
I'll be eternally grateful for any help whatsoever

Recovery it what it goes to in order to FDR so you must have a recovery apparently. You can't boot up at ALL I am guessing?
Sent from my Nexus 5

Bricked or fixable?

So I have a Google Pixel Verizon locked model, that has never been modified, and just recently started boot looping.
It shows the GOOGLE logo on the white background for a few seconds before the screen goes black and tries to boot again.
I am able to get to the recovery mode sometimes (usually when the phone is cold and then can boot into it, otherwise just goes into the same above boot loop.
I have been able to chill the phone by putting it in the fridge, then able to get into the recovery mode.
I have attempted a factory wipe and boot, but when I attempt boot, it just goes back to the boot loop of google screen and black screen
am I bricked? I wanted to try flashing a new rom, but since its locked, and I have no way to get into the phone to activate developer mode, I don't think I can do anything

It sounds like a hardware problem, especially when you mention that chilling the phone helps. Unless someone else has some ideas, your only other option might be to go through Google support.

When in recovery, have u tried booting to bootloader and flash stock firmware with fastboot?
Cheers
Sent from my Google Pixel using XDA Labs

yes, i get an error 21, which i believe is due to the locked bootloader

Since u can't go into fastboot, I think it's best to go to a service center or something.
Good luck.
Cheers
Sent from my Google Pixel using XDA Labs