IBM 16/4 Token-Ring manual Understanding the adapter LEDs, Amber Green Explanation

Universally

Administered

Address Label

Green

Amber

Figure 2. The adapter LEDs and labels

Understanding the adapter LEDs

The LEDs provide information useful for monitoring the status of the adapter and for solving problems. If the green LED is on and the amber LED is off, the adapter is operating correctly. If the amber LED is blinking and the green LED is on, a problem with the adapter has been detected. Table 5 indicates the sequence that displays when the you start the computer and the adapter reaches the open state successfully. Some of the states might be too brief to observe.

Table 5. Startup sequence of LED states

Amber	Green	Explanation
Blinking	Blinking	v	Slow blink.
			The adapter is waiting for initialization.
		v	Fast blink.
			The adapter has detected a wake-up frame and is attempting to wake up the system. If
			this state persists, it indicates that the attached PC does not have Wake on LAN
			enabled. To correct this problem, power on the PC and enable the Wake on LAN feature
			from the power management system configuration menu.
Off	Off	The adapter initialization is in progress, or the computer is powered off.
Off	Blinking	The adapter did not detect any problems during its self-diagnostic tests and is waiting to
		open.
		If this LED state occurs after the adapter has been opened, this state indicates that the
		adapter has been closed under software control.
Off	On	The adapter is open and operating correctly.

44IBM 16/4 Token-Ring PCI Management Adapter