Filter
Top Products
System pulse LEDs
The following LEDs are on the system board and indicates the system power-on and power-off sequencing
and boot progress (see “System-board LEDs” on page 112 for the location of these LEDs).
Table 4. System pulse LEDs
LED Description Action
Enclosure manager heartbeat
power-on and power-off sequencing. 1. If the LED ashes at 1Hz, it is
functioning properly and no action
is necessary.
2. If the LED is not ashing, (trained
service technician only) replace
the system board.
IMM heartbeat IMM heartbeat boot process.
The following steps describe the
different stages of the IMM heartbeat
sequencing process.
1. When this LED is ashing fast
(approximately 4Hz), the IMM
code is in the loading process.
2. When this LED goes off
momentarily, this indicates
that the IMM code has loaded
completely.
3. When this LED goes off
momentarily and then starts
ashing slowing (approximately
1Hz), theIMM is fully operational.
You can now press the
power-control button to power-on
the server.
4. If this LED does not ash within 30
seconds of connecting a power
ash to the server, complete the
following steps:
a. (Trained service technician
only) Use the IMM recovery
jumper to recover the rmware
(see System board jumpers).
b. (Trained service technician
only) Replace the system
board.
Diagnostic programs and messages
The diagnostic programs are the primary method of testing the major components of the server. As you
run the diagnostic programs, text messages are displayed on the screen and are saved in the test log. A
diagnostic text message indicates that a problem has been detected and provides the action you should
take as a result of the text message.
Make sure that the server has the latest version of the diagnostic programs. To download the latest version,
complete the following steps.
64 Hardware Maintenance Manual