Q: New Update wont let me turn phone back on

Hello, MikaelaaT. 

Thank you for visiting Apple Support Communities.

When experiencing issues restoring or updating an iPhone, here are the best articles to go through.  If you received a specific error number when restoring, see the section labeled Get more help in the last article below.

iOS: Not responding or does not turn on

http://support.apple.com/kb/ts3281

If you can't update or restore your iOS device

http://support.apple.com/kb/ht1808

Resolve iOS update and restore errors in iTunes

http://support.apple.com/kb/ts1275

Cheers,

Jason H.