The most common cause. The system tried to save data during shutdown but failed, causing a corrupted image.
Begin with a fundamental step. Completely disconnect the controller's power source (e.g., unplug it or switch off the main breaker) and wait for a minute. This allows any residual electrical charge to dissipate, ensuring a clean restart. Reconnect the power and turn the system on. A simple "glitch" is sometimes all that is wrong. fanuc starting system software please wait