Chapter 4 Troubleshooting the Installation

Identifying Startup Problems

Step 3 Listen for the system fan assembly. If you do not immediately hear the system fan assembly begin to operate, see “Troubleshooting the Power Supply” section on page 4-5.

Step 4 If you determine that the power supplies are functioning normally and that the fan assembly is faulty, contact a customer service representative. If the system fan assembly does not function properly at initial startup, there are no installation adjustments that you can make.

LED Readings

LEDs indicate all system states in the startup sequence. By checking the LEDs, you can determine when and where the system failed in the startup sequence. To check the LEDs, follow these steps:

Step 1 Compare the LED states to Table 4-1:

 

 

Cisco Catalyst 4900M Switch Installation Guide

 

 

 

 

 

 

78-18350-01

 

 

4-3

 

 

 

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Cisco Systems 4900M manual LED Readings