ESTAR LEDTV50A1T2 Schematic Diagram for ELMT6886-FG95 Chassis

ESTAR LEDTV50A1T2 schasis elmt6886-fg95 I don't know how to enter the service menu, I need to replace the screen. This is not working https://www.youtube.com/watch?app=desktop&v=s8z2_83JrPY