IBM System x3800 Problem Determination And Service Manual page 67

Before working inside the server to view light path diagnostics LEDs, read the
safety information that begins on page vii and "Handling static-sensitive devices" on
page 115.
If an error occurs, view the light path diagnostics LEDs in the following order:
1. Check the operator information panel on the front of the server.
v If the information LED is lit, it indicates that information about a suboptimal
condition in the server is available in the BMC log or in the system-error log.
Important: If the server has a baseboard management controller, clear the
BMC log and system-event log after you resolve all conditions. This will turn
off the information LED and LOG LED, if all conditions are resolved.
v If the system-error LED is lit, it indicates that an error has occurred; go to
step 2.
The following illustration shows the operator information panel.
Power-control button
USB connector
Power-on LED
Hard disk drive activity LED
Locator LED
2. To view the light path diagnostics panel, press the release latch on the front of
the operator information panel to the left; then, slide it forward. This reveals the
light path diagnostics panel. Lit LEDs on this panel indicate the type of error that
has occurred.
OVER SPEC
REMIND
Look at the system service label on the top of the server, which gives an
overview of internal components that correspond to the LEDs on the light path
diagnostics panel. This information and the information in "Light path diagnostic
LEDs" on page 53 can often provide enough information to correct the error.
Information LED
Light Path
Diagnostics
PS LINK
CPU VRM LOG
MEM NMI PCI
SP DASD RAID
NONRED TEMP FAN
PCI CPU I/O
BRD BRD BRD
Release latch
System-error LED
Chapter 2. Diagnostics
51