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Chapter 1: Introduction
Unit Identifier Switch/UID LED Indicator
A Unit Identifier (UID) switch and an LED Indicator are located on the motherboard. The UID
switch is located at UID SW, which is next to the VGA port on the back panel. The UID LED is
located next to the UID switch. When you press the UID switch, the UID LED will be turned on.
Press the UID switch again to turn off the LED indicator. The UID Indicator provides easy
identification of a system unit that may be in need of service.
UID Switch
Pin Definitions
Pin#
Definition
1
Ground
2
Ground
3
Button In
4
Button In
UID LED
Pin Definitions
Color
Status
Blue: On
Unit Identified
