What is the blinking green LED light for on the PCM400 CPU board?
The green light on the CPU is designed as a easy indicator that the board is functioning properly. It blinks at a timing of approximately one second on and one second off. If the green light is always OFF, it indicates that either the board has lost power or that the board has become damaged and must be replaced. If the light is always ON, it indicates that the board may have become damaged. During certain programming operation such as the loading or unloading of the PCM’s programming, the light may momentarily stop blinking, this is normal.
