guys help l have ipad mini 3 wifi + cellular…….i left it to charge over night and in the morning l found it not switching on i then plugged it again and after some minutes it beggan to switch on , apple loggo, red flash ,dark screen then reboots. it kept on doing that , i have left it to charge for about 2days but keeps rebooting tryed to restore with itunes but it failed….error 4013……anyone help