How do I repair screen display

sm-t561 will start normally and boot to samsung logo and start changing color and short down. i have check the flex and it is ok. what can i do next to make it display normal?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0