Final answer:
The blue ON light typically indicates a system has power and is activated, while the green AVAIL light shows that the system is fully operational and ready for use.
Step-by-step explanation:
The difference between the blue ON light in the start switch and the green AVAIL light is typically indicative of different states of readiness or operational status in an electronic or mechanical system. While this can vary depending on the specific device or machinery, generally, the blue ON light may indicate that the system has been activated and has power running to it, signaling that it is in a state where it can perform its function. In contrast, the green AVAIL light often denotes that the system is not only powered on but also fully functional and ready for use or that it is available for a new operation or cycle to begin.
For instance, in the context of industrial machinery, the blue light might mean that the machine's power switch has been turned on, but it may still be in the process of initialization or self-testing. The green light would illuminate once the machine has completed its startup routine and is ready to receive input or start a task. In the context of computer servers, the blue light could signify the server is powered, whereas the green could indicate it has completed booting up and is ready to handle requests.