ProLiant DL740 Server Maintenance and Service Guide

Connectors, Switches, and LED Indicators
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 the front of the server, the Front UID switch illuminates two LEDs. An LED
on the front of the server indicates that the switch is activated and an LED on the 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.
Figure 7-6 displays the locations of the UID LED switch on the front and rear of the server.
Figure 7-6: Locating the UID LED switches
7-8 HP ProLiant DL740 Server Maintenance and Service Guide
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