Operation Manual

Viewing error logs from the diagnostic programs
Start the diagnostic programs; select Hardware Info from the top of the diagnostic
programs screen; select System Error Log from the list that appears; then, follow
the instructions on the screen. See “Starting the diagnostic programs” on page 23
for more information.
Light path diagnostics
Many errors are first indicated by the illumination of the information LED or
system-error LED in the operator information panel on the front of the server. If one
or both of these lights are lit, one or more lights elsewhere in the server might also
be lit and can direct you to the source of the error.
This light path diagnostics feature provides a path that you can follow in three
phases to help identify the source of an error. The lights are designed to be
followed in an orderly progression, depending on the error.
Note: Read “Safety information” on page 147 and “Handling static-sensitive
devices” on page 30.
The lights are viewed in the following order:
1. Begin on the front panel by checking the operator information panel.
v The information LED indicates that information concerning a sub-optimal
condition in the server is available in the system-error log.
v The system-error LED indicates that an error has occurred.
If the system-error LED on this panel is lit, go to step 2.
Power-control button
Power-on LED
Reset button USB connector
SCSI activity LED Information LED
System-error LED
Locator LED Release latch
Note: The LEDs and connectors on the operator information panel are
described in “Front view” on page 4.
2. Open the operator information panel by pressing the release latch to swing the
panel out and reveal the light path diagnostics panel. Lit LEDs on this panel
indicate the type of error that has occurred.
DASD NMIPCI EXP
LOGPS2 CPUFAN
VRM OVER SPECTEMP
NR SPMEM
REMIND
PS1
Then, check the system service label. This label gives an overview of internal
components that correspond to the LEDs on the light path diagnostics panel.
This information, combined with the information in the table “Light path LED
errors” on page 93, can often provide enough information to correct the
indicated error.
18 IBM xSeries 365 Types 8861, 8862: Hardware Maintenance Manual and Troubleshooting Guide