Default Smart dock not working..

This is actually for my brothers phone. He broke the screen on his note 3 (it shows no video at all) so we got the Samsung Smart dock for it. It was working fine until it software updated. Upon rebooting it no longer displays and video through HDMI. I can hear the jingle as the phone boots up and I can assume that the OS is fully loaded as the lights on the keyboard and mouse come on, but still no video. Tried different HDMI cables and TVs but still nothing. I was able to flash firmware NE6 via odin just incase it failed to update on its own, but that still did not change anything. Anyone have any suggestions on how I can get this thing working again?