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Unit ID LED
A rear UID LED indicator (UID-LED) is located near the UID switch on the I/O back panel.
This UID indicator provides easy identification of a system.unit that may need service.
HDD LED
An HDD LED indicator, located at HDD_ LED1 on the motherboard, indicates the status of
onboard hard drive disks including SATA devices. When HDD_ LED1 is blinking, all onboard
HDDs are functioning normally. See the table below for more information.
Onboard Memory_Fault LED Indicators
The memory-fault LED indicators are located at P1_LED_A1 - P2_LED_F2 on the motherboard.
Each memory LED indicates the status of the DIMM module installed on the memory slot
that carries the same name. For example, if P1_LED_A1 is on, it indicates that an error has
occurred to the DIMM module installed on the P1-DIMMA1 memory slot. See the tables below
for more information.
LED Indicator
P1_LED_A1 / P1_LED_A2
P1_LED_B1 / P1_LED_B2
P1_LED_C1 / P1_LED_C2
P1_LED_D1 / P1_LED_D2
P1_LED_E1 / P1_LED_E2
P1_LED_F1 / P1_LED_F2
P2_LED_A1 / P2_LED_A2
P2_LED_B1 / P2_LED_B2
P2_LED_C1 / P2_LED_C2
P2_LED_D1 / P2_LED_D2
P2_LED_E1 / P2_LED_E2
P2_LED_F1 / P2_LED_F2
LED Color
LED On: Red
UID LED
LED Indicator
LED Color
Definition
Blue: On
Unit Identified
HDD LED
LED Indicator
LED Color
Definition
Green: Blinking
HDDs: Normal
Memory-Fault LED Indicators &
Corresponding Memory Modules
Corresponding DIMM Module
P1-DIMMA1 / P1-DIMMA2
P1-DIMMB1 / P1-DIMMB2
P1-DIMMC1 / P1-DIMMC2
P1-DIMMD1 / P1-DIMMD2
P1-DIMME1 / P1-DIMME2
P1-DIMMF1 / P1-DIMMF2
P2-DIMMA1 / P2-DIMMA2
P2-DIMMB1 / P2-DIMMB2
P2-DIMMC1 / P2-DIMMC2
P2-DIMMD1 / P2-DIMMD2
P2-DIMME1 / P2-DIMME2
P2-DIMMF1 / P2-DIMMF2
Memory-Fault LED
LED Indicator
Definition
Corresponding DIMM Module: Bad
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Chapter 4: Motherboard Connections
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