IBM 8237, Инструкция по установке и эксплуатации

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Chapter 2. Installing the 8237
2-7
Powering On the 8237
This section describes how you should expect the LEDs to function when you power
the 8237 ON.
1
Connect the power cord to the connector at the rear of the 8237, as shown in
Figure 2-6.
Figure 2-6. Connecting the Power Cord
2
Insert the other end of the power cord into the electric outlet.
Note: There is no power switch on the 8237.
3
Look for the following LED blink sequence:
•
First, all the Link, Partition, and Utilization LEDs on the front panel should
blink for approximately 4 seconds. All other LEDs remain on during this
time.
•
Then, the five Collision LEDs will turn on, then off, in sequence from left to
right as each diagnostic test is performed. During this time, the Hub ID
display will show the letter “P” to indicate that tests are in progress and
the Backplane LEDs will continuously blink ON/OFF in sequence.
Note: Because the power-on self-test (POST) diagnostics are of a brief
duration, it may appear that one or more of the LEDs did not turn on and
off. The important thing to note is whether any of the collision LEDs
remain on, indicating a failed component. If this occurs, go to Chapter 4,
"Troubleshooting, Installation, and Replacement Procedures."
•
Finally, all LEDs that are appropriate for the particular 8237 stack
configuration you have installed (such as the Expansion Port,
management, and backplane LEDs) should reach their normal states.
See Table 3-1 on page 3-44 and Table 3-2 on page 3-45 for more
information concerning the LEDs.