System-Board Leds - Lenovo ThinkServer RD120 Hardware Maintenance Manual

System-board LEDs

The following illustration shows the light-emitting diodes (LEDs) on the system
board.
1
Riser-card-missing error LED
2
RAID error LED
3
DIMM error LED (12)
4
BMC heartbeat LED
5
Power channel error LED (4)
Table 3. System-board LEDs
LED
Error LEDs
BMC heartbeat LED
12-volt power (A, B, C, D)
LEDs
6
VRM error LED
7
Microprocessor error LED (2)
8
PCI slot error LED (2)
9
Remote Supervisor Adapter II
SlimLine error LED
10
3 V battery error LED
Description
The associated component has failed.
This LED flashes to indicate that the BMC (baseboard
management controller) is functioning normally.
If any of these LEDs is lit, there is a failure in the associated
system board power channel (see "Power problems" on page
155).
15
Chapter 1. Introduction