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4-2
CRU Replacement and Server Upgrades
General Information
This chapter contains procedures for removing and installing customer-
replaceable units (CRUs) and step-by-step instructions for upgrading your
server system. When you disassemble any part of the server, note the orientation
and placement of any cables or shielding that you remove.
!
WARNING
The DC push button on/off switchs on the PCI modules do
not turn off system AC power. Also, +5vdc is present on the
system boards whenever the AC power cord is connected
between the system and an AC outlet. Before performing
any procedures that require the server to be off, first power
off the DC by pushing the power on/off button. Make sure
your system is powered off and the AC power cord is
unplugged from the system. Failure to disconnect power
before opening your system can result in personal injury and
equipment damage.
!
CAUTION
Operating your system with the access cover removed can
damage system components. For proper cooling and airflow,
always replace the access cover before powering on.
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