If a control system's touch screen is locked or frozen, what should be done first?

When a control system's touch screen is locked or frozen, the first step should be to check all connectors and power saver mode. This is essential because a locked or unresponsive screen can often be attributed to a loss of communication or power supply issues. By inspecting the connectors, you can ensure that everything is securely attached and functional. Additionally, checking the power saver settings may reveal if the device is simply in a low-power state that requires user interaction or adjustment.

Starting with these checks is the most logical approach as it addresses the potential causes that are easiest to resolve before considering more complicated solutions or sending the device for repair. If the touch screen is malfunctioning due to connectivity problems or power management, these simple troubleshooting steps can often restore functionality.