IBM System x3650 M3 4255 Service Manual page 39

Table 6. System Pulse LEDs
LED
Enclosure manager heartbeat Indicates the status of
IMM heartbeat
Description
power-on and power-off
sequencing.
When the server is
connected to power, this LED
flashes slowly to indicate that
the enclosure manager is
working correctly.
Indicates the status of the
boot process of the IMM.
When the server is
connected to power this LED
flashes quickly to indicate
that the IMM code is loading.
When the loading is
complete, the LED stops
flashing briefly and then
flashes slowly to indicate that
the IMM if fully operational
and you can press the
power-control button to start
the server.
Action
(Trained service technician
only) If the server is
connected to power and the
LED is not flashing, replace
the system board.
If the LED does not begin
flashing within 30 seconds of
when the server is connected
to power, complete the
following steps:
1. (Trained service
technician only) Use the
IMM recovery jumper to
recover the firmware (see
"System-board switches
and jumpers" on page
17).
2. (Trained service
technician only) Replace
the system board.
Chapter 2. Introduction
21