Can you elaborate on "stopped working"?

And were you installing via an over-the-air (OTA) update or flashing the factory image?

 

That's exceptionally odd. By "bootloop", do you mean that the boot process continually restarted? Or just that it took a long long time to boot? The first boot after an update often takes a long time - even up to and beyond 20 minutes in some cases.

And no, the OTA hasn't been pulled: http://android.clients.google.com/p....signed-occam-LRX21T-from-KTU84P.1c6f10c3.zip

^ you can download that directly and flash it via "adb sideload" if you feel up to it.

You just generally only get one shot to install it. The notification will appear again within a week or two once your number comes up again.

 

If you had rooted with a custom recovery, it's very likely to fail. If you mean by "stayed in bootloop" that it hung on the the boot screen, then it might have actually succeeded and was taking it's good old time recompiling your apps for ART. I know that in 4.4.4 it takes a good 20 minutes for my 100+ apps to recompile. I would have thought it would have been improved with lollipop, but maybe that's just part of the in-place upgrade.

I'm sure the OTA will show up again, you just have to hit the notification cycle again. It showed up for me, but I'm through with OTA's as not one has really worked. I will flash the factory image for 5 on my N4 when my N6 arrives.

<<-- victim of a codesplice ninja

 

Flashing the factory image (manually via fastboot, not with a toolkit) is a pretty surefire way to bring a Nexus back to life when something goes wrong. It's also a good way to make sure you start with a clean slate on a new Android version.

Short of that, you could also try doing a factory reset from the stock recovery. Either way you'll lose any data that isn't backed up in The Cloud, but you'll at least have a working phone again.

 

Hi margie1721, and welcome to Android Forums

If the OTA notification does return when you go to System Updates > Check Now, that probably means that you'll have to wait. It should come back around within a week or so I'd imagine.

Or if you're feeling adventurous, you can download the OTA directly and flash it manually: http://android.clients.google.com/p....signed-occam-LRX21T-from-KTU84P.1c6f10c3.zip

Let us know if you want to go that route and we can talk you through it.