
Chapter 12. System maintenance and diagnostics 473
If the Service Processor detects a problem during POST, an error code is logged
in the AMM event log. Error codes are also logged in Linux syslog or AIX
diagnostics log, if possible.
See “Checkpoint code (progress code)” on page 479for more details.
Light Path and Front Panel diagnostics
IBM BladeCenter JS23 and JS43 Express comes with the Light Path technology,
which helps on determining
Customer Replaceable Units (CRU) with problems.
Both the Base and MPE planar boards have LEDs for signaling faulty parts. The
Front Panel is also part of the Light Path diagnostics solution, with LEDs to help
verifying the current state of the system.
Front Panel (Control Panel)
IBM BladeCenter JS23 and JS43 Express have the same Front Panel, shown in
Figure 12-10 on page 473.
Figure 12-10 IBM BladeCenter JS23 and JS43 Control Panel
The Front Panel has buttons and LEDs that help on controlling and getting status
from your Blade server. Table 12-1has a short description for each button and
LED located in the Front Panel. See BladeCenter JS23 and BladeCenter JS43
Type 7778 Problem Determination and Service Guide, Part Number: 44R5339
for more information.
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