crwdns2933897:0crwdne2933897:0

How come only the upper left corner lights up after start up?

The full screen works on startup, but after that, only the upper left corner lights up.

when i shut it down, the full screen works again.

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

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0