IBM 16/4 Token-Ring - Manual (Page 52)

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.
Universally
Administered
Address Label
Amber
Green
Figure 2. The adapter LEDs and labels
44 IBM 16/4 Token-Ring PCI Management Adapter