Default [Q] Don't know its fixable

i installed the CM11 rom and all went well but when i did a factory reset on it so I could make a clean back up it didnt reboot and my transformer prime has been like this for 2 hours

so I just wanted to know if I could fix it or if its dead

P.S sorry if this question was already answered I don't know what this screen is called and I've looked every were on xda, youtube, and google to try and fix it.

Edit: after 2 hours and 30 mins it reboots and works perfectly