Try switch it on whilst connected to your computer and copy what you can via Windows Explorer.
Or reset it then use data recovery software to retrieve your data like Recuva or if naughty like me download a hacked copy of EaseUs (http://www.easeus.com/android-data-recovery-software/) via torrent and hey presto!
Or reset it then use data recovery software to retrieve your data like Recuva or if naughty like me download a hacked copy of EaseUs (http://www.easeus.com/android-data-recovery-software/) via torrent and hey presto!