Put the LED Control PC in the control room. It can only be used when the scoring console is on the court.
Advantage:
Simple and affordable.
Disadvantage:
Edit the team and player info, or control the advertising through the PC in the control room. The PC on the court can only be used for referee controlling.
Use the "Display" program on the PC in control room. There is another PC on the court which can be used for match control as the "Terminal" program, be used for match controlling.
Advantage:
The best solution for one screen case. This is what the real professional scoring system should be.
Put just one PC in the control room for controlling all LED screens. Only use the scoring console on the court.
Advantage:
Low cost.
Disadvantage:
All screens can only be used to display the same contents. You cannot display the scoreboard on one screen and display player info on another screen. The team and player info should be edit on the PC in the control room.