HP Networking Switch Power Supplies - Manual (Page 10)

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Figure 7 Fasten the power cord connected to a horizontally-installed power module
3. Plug the other end of the power cord into an AC power receptacle of the power
source, and turn on the connected circuit breaker.
4. Check that the input status LED is ON. It indicates that the power cord is correctly
connected. If the input status LED is OFF, troubleshoot the installation process until
the input status LED is ON.
Removing a power module
Figure 8 illustrates the flow for removing a power module. Strictly follow the sequence to
avoid possible dangers.