52 Upgrade and Maintenance Manual TX2550 M4
Basic hardware procedures
4.1.3.2 Local diagnostic indicators on the system board
Using the Indicate CSS button
Ê Shut down and power off the server.
Ê Disconnect the AC power cord(s) from the system.
I It is mandatory to disconnect power cords in order to use the Indicate
CSS functionality.
Ê Press the Indicate CSS button to highlight defective components (see
section "Onboard indicators and controls" on page 499).
Component LEDs
Ê Check the component LEDs on the system board and the server rear (see
section "Connectors and indicators" on page 497).
I In addition to local diagnostic indicators, CSS or Global Error LEDs
indicate, if the defective component is a customer replaceable unit or if a
service technician needs to be dispatched to replace the part (see
section "Determining the error class" on page 50).
If the system has been powered off to replace a non hot-plug unit, a
system of PRIMERGY diagnostics indicators guides you to the faulty
component.
4.2 Shutting down the server
V CAUTION!
For more safety information, see chapter "Important information" on
page 37.
I This step is only required when upgrading or replacing non-hot plug
components.
Ê Inform the system administrator that the server will be shut down and put
offline.
Ê Terminate all applications.
Ê Perform the required procedures described in the preliminary steps of each
upgrade or maintenance task.
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