The GT-100 contains an Auto-off feature which shuts down the power automatically after it has not been used for 10 hours. From the factory, the Auto-Off feature is set to "ON."
Here's how to disable the Auto-Off feature.
1. Press SYSTEM.
2. Turn knob 4 to highlight the "AUTO OFF" icon.
3. Turn Knob 3 counterclockwise to set the switch to "OFF."
4. Press EXIT when you're finished. The new setting is saved automatically.