System-Board Leds - IBM System x3620 M3 7376 Installation And User Manual

System-board LEDs

The following illustration shows the light-emitting diodes (LEDs) on the system
board.
Note: Error LEDs remain lit only while the server is connected to power. If you
disconnect power to the server, you can press and hold the light path diagnostics
button to light the error LEDs on the system board.
System pulse LEDs
The following LEDs are on the system board and monitor the system power-on and
power-off sequencing and boot progress (see "System-board LEDs" for the location
of these LEDs).
Table 4. System pulse LEDs
LED
Enclosure management heartbeat
28
System x3620 M3 Type 7376: Installation and User's Guide
Description
Power-on and power-off sequencing.
Action
1. If the LED blinks at 1Hz, it is
functioning properly and no action
is necessary.
2. If the LED is not blinking, (trained
service technician only) replace
the system board.