Power supply replacement
5-5
Power Supply Replacement
c. Secure the power supply to the chassis by screwing in the 
captive screw using the Phillips-head screwdriver.
7. Plug the power cord in to the power supply and power on the 
switch by pressing the AC power switch to the “1” symbol. 
8. Verify that the LED on the new power supply displays a steady 
green light while the switch is operating (Table 5-1 on page 5-3). If 
the LED is not green, ensure that the power supply is securely 
installed.
9. Optionally, enter the psShow command at the command line 
prompt to display power supply status (Figure 5-1 on page 5-2 for 
the location of Power supply #1 and Power supply #2.
Figure 5-2 Inserting the power supply in theDS-4900B switch
scale: 1/4" = 1"
Scale:
3/8" = 1"
scale: 1/4" = 1"
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