Chapter 3 Installing the Switch
Removing and Replacing the Power Supply
3-22
Cisco Catalyst 4900M Switch Installation Guide
78-18350-01
Step 2 When the switch is online, enter the show module command. Verify that the
system acknowledges the new module and that the module’s status is listed as
good in the command output.
Step 3 If the module is not operational, reseat it. If the module is still not operational,
contact your customer service representative.
Removing and Replacing the Power Supply
This section describes how to remove and install the AC and DC-input power
supplies. This information is presented in the following sections:
• Required Tools, page 3-23
• Removing a Power Supply, page 3-23
• Installing a Power Supply, page 3-24
Warning
Hazardous voltage or energy is present on the backplane when the system is
operating. Use caution when servicing.
Statement 1034
Locate your power supply and notice the location of the captive installation
screws.
Note The power supplies are hot-swappable, so in redundant mode you will not need to
power down the switch to replace most power supplies. In combined mode some
slots may lose power during power supply replacement.