Light Path Diagnostics - IBM 6000R - Netfinity - 8682 Hardware Maintenance Manual

Notes:
1. The server does not support replaceable voltage regu-
lator modules (VRMs).
2. The server supports a maximum of three PCI buses.
3. The server supports a maximum of three power sup-
plies.

Light path diagnostics

You can use the light path diagnostics built into the server to
quickly identify the type of system error that occurred. The
server is designed so that LEDs remain illuminated when the
server shuts down, as long as the power supplies are oper-
ating properly. This feature helps you to isolate the problem
if an error causes the server to shut down.
If the system error LED (on the information LED panel) is not
lit and no diagnostics panel LEDs are lit, it means that the
light path diagnostics have not detected a system error.
If the system error LED (on the information LED panel) is lit,
it means that a system error was detected. Check to see
which of the LEDs on the diagnostics panel inside the server
are lit and refer to the following table:
Table 1. Light path diagnostics
LED on
None
CPU
Memory
PCIA
PCIB
PCIC
PCID
PS1
PS2
22
Netfinity 6000R Type 8682 Models 1RY, 2RY
1. The system error log is 75% or more full
or a PFA alert was logged. (See
"Diagnostic panel error LEDs" on page
157.)
2. Bad, missing, or mis-installed
processor terminator.
One of the microprocessors has failed. (See
"Diagnostic panel error LEDs" on page 157.)
A memory error occurred. (See "Diagnostic
panel error LEDs" on page 157.)
An error occurred on PCI bus A. An adapter
in PCI slot 1, or the system board, caused
the error. (See "Diagnostic panel error
LEDs" on page 157.)
An error occurred on PCI bus B. An adapter
in PCI slot 2, 3, or 4, or the system board,
caused the error. (See "Diagnostic panel
error LEDs" on page 157.)
An error occurred on PCI bus C. An adapter
in PCI slot 5 or 6, or the system board,
caused the error. (See "Diagnostic panel
error LEDs" on page 157.)
Not implemented at this time.
The first power supply has failed. (See
"Diagnostic panel error LEDs" on page 157.)
The second power supply has failed. (See
"Diagnostic panel error LEDs" on page 157.)
Cause