Technical data

FIGURE 13 Inserting the power supply in the Brocade 7840
6. Verify that the LEDs on the new power supply display steady green while the Brocade 7840 is
operating (refer to LEDs on the nonport side of the switch on page 34). If the LEDs are not steady
green, ensure that the power supply is securely installed and seated properly.
Optionally, if using the command line interface (CLI), enter the psShow command at the command
line prompt to display the status. You can also use the chassisShow command. The power supply
status can also be viewed using the Web Tools application.
Fan removal and replacement
The Brocade 7840 has three fan FRUs. The Fabric OS identifies the fan locations from left to right as
fan #3, fan #2, and fan #1.
NOTE
Disassembling any part of the fan voids the part warranty and regulatory certifications. There are no
user-serviceable parts inside the fan. Because the cooling system relies on pressurized air, do not
leave any of the fan slots empty longer than two minutes while the switch is operating. If a fan fails,
leave it in the switch until it can be replaced. Maintain all three fans in operational condition to provide
redundancy.
Refer to LEDs on the nonport side of the switch on page 34 for the power supply status LED colors,
behaviors, and actions required, if any.
Fan removal and replacement
44 Brocade 7840 Extension Switch Hardware Reference Manual
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