HP ProLiant DL740 Server - Manual (Page 234)

LED Indicators and Switches
System Power LED Switch
Figure D-1 shows the location of the system power LED switch.
Figure D-1: System power LED switch
Unit Identification LED Switches (Front and Rear)
The ProLiant DL740 server offers Unit Identification(UID) LED switches to aid in
identifying specific servers in a rack environment. Each ProLiant DL740 server has
two unit identification switches, one on the front of the server and one on the back of
the server. When activated from either the front or rear of the server, both Unit
Identification switches illuminate. An LED on the front and rear of the server
provides a visual reference for service personnel. When moving between the front
and rear of a rack filled with ProLiant DL740 servers, you can use the unit
identification switches to quickly identify one or more servers that require service or
maintenance.
D-2 HP ProLiant DL740 Server User Guide
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