Light Path Diagnostics Panel - IBM 7979B1U User Manual

Light path diagnostics panel

The following illustration shows the controls and LEDs on the light path diagnostics
panel.
To access the light path diagnostics panel, slide the release latch on the front of the
operator information panel to the left.
For more information about light path diagnostics, see the Problem Determination
and Service Guide on the IBM System x Documentation CD.
The following table lists the LEDs on the light path diagnostics panel and suggested
actions to solve the detected problems.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the parts listing in the Problem Determination and Service Guide to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
LED Description
None, but An error has occurred and cannot be
the diagnosed, or the Advanced System
system- Management (ASM) processor on the
error LED Remote Supervisor Adapter II SlimLine
is lit. has failed. The error is not represented
by a light path diagnostics LED.
OVER The power supplies are using more
SPEC power than their maximum rating.
Light Path
Diagnostics
OVER SPEC
CPU
REMIND
MEM
SP
FAN
PCI
PS1 PS2
VRM CNFG
NMI
S ERR
DASD RAID
TEMP BRD
Action
Check the system-error log for information about the error.
1. Remove optional devices from the server.
2. Replace the failing power supply.
Attention: In a dc power environment, only trained
service personnel other than IBM service technicians are
authorized to connect or disconnect power to the dc power
supply and to remove and install a dc power supply. See
the documentation that comes with each dc power supply.
Chapter 2. Installing optional devices
25