TX120 S3 Upgrade and Maintenance Manual 61
Basic hardware procedures
4.3 Opening the server
V CAUTION!
● Before removing or installing covers, turn off the server and all
peripheral devices. Also unplug all power cables from the outlet.
Failure to do so can cause electric shock.
● In order to comply with applicable EMC regulations (regulations on
electromagnetic compatibility) and satisfy cooling requirements, the
PRIMERGY TX120 S3 server must not run while the side cover is
removed.
● For further safety information, please refer to chapter "Important
information" on page 37.
Ê Shut down and power off the server as described in section "Shutting down
the server" on page 58.
Ê Unlatch and remove the power cord from the power supply units as
described in section "Disconnecting power cords" on page 59.
Ê Remove all external cables from the rear connector panel and expansion
cards. For further information, refer to section "Connectors and indicators"
on page 427.
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