screen is shutting down after 2 min please help

Hello up community,

My up-board is doing well and i really like it but there is one problem. Evrytime when i start up my Up-Board it does really well and the screen works but after 2 min the screen shut down and i can't get it back. I have tried another screen but that don't work. Please help i really like the up-board but i can't do something now.

kind regards