If the GOT screen is black and does not respond to touch, check the POWER LED on the main unit.

• Solid orange
 Cause: Screen saver is active
 Solution: Check the status of System signal 1-1.b1 (Forced Screen Saver Enable signal). 
• Solid blue
 Cause 1: Communication error 
 Solution 1: Check that the controller settings are correct using the utility or screen design software. 
 Cause 2: Insufficient security level 
 Solution 2: Log in again as a user with a higher security level. 
 Cause 3: Display damage or system application error
 Solution 3: Rewrite the package data. 
• Off
 Cause: Power is not supplied to the GOT. 
 Solution: Check the power supply wiring and power supply voltage to the GOT.

If the solutions above do not resolve the problem, refer to the hardware manual.