26 Upgrade and Maintenance Manual RX900 S2
Before you start
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Replacing a faulty component
The global error indicator on the front and on the rear side of the server indicates 
that a hardware components needs to be replaced. For information on the 
control elements and indicators of your server see "PRIMERGY RX900 S2 
Server - Operating manual".
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. The 
CSS button enables the indicator of the faulty component to light up even if the 
power has been switched off, see "Using diagnostics information" on page 37.
If a defective component is included in the CSS concept, the CSS indicators on 
the front and rear side of the server light up. For more information see the 
"ServerView Suite Local Service Concept - LSC" manual and the "Customer 
Self Service (CSS)" manual on the ServerView Suite DVD 2.
It is recommended to prepare local maintenance tasks by remote diagnostics 
procedures introduced in the "ServerView Suite Local Service Concept - LSC" 
manual on the ServerView Suite DVD 2.