[Q] Need help with my s3 mini topic

hi fellas i need your help my s3 mini got me into trouble when i flash cm12. If i boot the phone the Samsung logo is not showing up it only shows splashed screen and also if the phone is switched off and i plug in charger battery icon will not show i only see white splashed screen. Is there anything that i will flash in order to restore the Samsung logo and the offline battery logo? I really need help.