NEC Express5800/R140a-4 User Manual page 385

12.
Press the PCI Hot Plug switch. The PCI Slot Power LED flashes once and then, goes on.
NOTES:
If the server runs on Windows Server 2003, the operating system
automatically recognizes the additionally installed PCI board and
installs the driver.
If an error occurred in the installed board or slot, the PCI Slot Fault
LED goes on (amber).
13.
Reinstall the top cover and place the server into the rack.
PCI hot plug switch
Upgrading Your Server 9-33