Lenovo ThinkServer RD120 - System-Board Leds

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