System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system
board.
H8 Heartbeat
LED
Fan 2 error LED
SAS/SATA Controller
Error LED
Riser-card 2
error LED
Microprocessor error LED
DIMM 1 - 6
error LEDs
System board
error LED
Standby
power LED
Fan 4
error LED
IMM heartbeat error LED
Riser-card 1
error LED
Heatsink
Orientation
DIMMs
DIMMs
Battery error LED
Fan 5
error LED
Fan 3 error LED
Fan 1 error LED
Note: When you disconnect the power source from the server, you lose the ability
to view the LEDs because the LEDs are not lit when the power source is
removed. Before you disconnect the power source, make a note of which
LEDs are lit, including the LEDs that are lit on the operation information
panel and LEDs inside the server on the system board.
Table 3. System-board LEDs
LED Description
Error LEDs When one of these LEDs is lit, it indicates that the associated
component has failed.
IMM heartbeat LED This LED flashes to indicate that the IMM is functioning
normally.
Standby power LED When this LED is lit, it indicates that the server is connected
to ac power.
24 IBM System x3250 M3 Types 4251, 4252, and 4261: Installation and User’s Guide