IBM 88643RU - System x3850 - 8864 Service Manual page 118

Many errors are first indicated by a lit information LED or system-error LED on the
operator information panel on the front of the server. If one or both of these LEDs
are lit, one or more LEDs elsewhere in the server might also be lit and can direct
you to the source of the error.
Note: Read the safety information beginning on page vii and "Handling
static-sensitive devices" on page 31.
View the LEDs in the following order:
1. Check the operator information panel on the front of the server.
2. To view the light path diagnostics panel, press the release latch on the front of
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IBM System x3850 Type 8864: Problem Determination and Service Guide
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
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
NONRED
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
Information LED
System-error LED
Light Path
Diagnostics
PS LINK
VRM
CPU LOG
MEM NMI
PCI
RAID
SP DASD
TEMP FAN
PCI CPU I/O
BRD BRD BRD
Release latch