Q: I clicked "update to iOS 8.2" and now the iPad Air 2 will not boot up

Hello HWbkeys,

It sounds like you are not able to turn on your iPad after updating to iOS 8.2. I would use these troubleshooting steps from the following article about issues like that:

If your iPhone, iPad, or iPod touch doesn't respond or doesn't turn on

If you see a black screen

You might need to charge your device before it can turn on. Plug in your device and let it charge for at least 10 minutes (20 minutes for iPad), then try turning it on. 

You should see a battery icon while your device is charging. If you continue to see a black screen, reset your device. 

 

If your device doesn't respond when you press buttons

Your device might not return to the Home screen when you press the Home button, wake from sleep when you press the Sleep/Wake button, slide to unlock or power off, or it might appear frozen. Try these steps:

1. Restart your device.
2. If it still doesn't respond, or if it doesn't turn back on, reset your device.

If you still need help after trying the steps above, contact Apple Support. 

Thank you for using Apple Support Communities.

Regards,

Sterling