UPDATE: I got rid of the codes still need help with the screen

-I completed all the steps as told, the battery is in place but i still have two major issues with the phone.

1) The phone keeps fading out black and reactivating without the phone starting up

2)The screen (if not fading out) will display some type of codes and will not allow me to do anything except force shut off the phone

-Any insight as to what the problem may be? Really need this phone fixed.