HP ProLiant DL740 Server - Manual (Page 235)

LED Indicators and Switches
Figure D-2 displays the locations of the Unit Identification LED switches on the front
and rear of the server.
Figure D-2: Locating the UID LED switches
System Interconnect LED Indicators
To prevent damage to critical system components, the ProLiant DL740 server will
not power up if it detects that certain components are not installed or are installed
incorrectly. The system interconnect LEDs provided with ProLiant DL740 servers
provide a closed-loop checking mechanism for verifying proper component mating
and interconnections between critical server components. LEDs provide visual
assistance in isolating components to check if the server will not power up because of
a component or module that is not fully installed. If a status indicator light is on,
reseat the component represented by the indicator. Refer to the hood labels for
component location.
IMPORTANT: To check system interconnect status LEDs, place the server in Standby mode
with the power supplies plugged in.
HP ProLiant DL740 Server User Guide D-3
HP CONFIDENTIAL
Writer: Anna Roberts File Name: n-appd LED Indicators and Switches.doc
Codename: Expedition Part Number: 270854-002 Last Saved On: 6/17/03 2:39 PM