Why is my phone be repeatedly turning on and off on boot screen?

[AC Question]

I try to turn it on and all it does is show the oping screen and then it flashes that off and on

 

[Laura Knotek]

Welcome to AndroidCentral.

What phone do you have?

What you are seeing is a bootloop. Please see the following thread. http://forums.androidcentral.com/general-help-how/325316-guide-bootloop-recovery-noob-friendly.html