IBM DR550, Problem Determination And Service Manual

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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 x3650 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.
Symptom Action
The OVER SPEC LED on the
light path diagnostics panel is
lit, and the one of the power
channel LEDs on the system
board is lit.
See the power troubleshooting table in the x3650 Problem Determination and Service
Guide or call for service.
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.
See the information about solving undetermined problems in the x3650 Problem
Determination and Service Guide .
Serial port 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 x3650 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.
Symptom Action
The number of serial ports that
are identified by the operating
system is less than the number
of installed serial ports.
1.
Make sure that:
v
Each port is assigned a unique address in the Configuration/Setup Utility
program and none of the serial ports is disabled.
v
The serial-port adapter (if one is installed) is seated correctly.
2. Reseat the serial port adapter, if one is present.
3. Replace the serial port adapter, if one is present.
A serial device does not work.
1. Make sure that:
v The device is compatible with the server.
v
The serial port is enabled and is assigned a unique address.
v The device is connected to the correct connector (see “Rear view” on page
23).
2. Reseat the following components:
a. Failing serial device
b. Serial cable
c. Remote Supervisor Adapter II SlimLine (if one is installed)
3. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. Failing serial device
b. Serial cable
c. Remote Supervisor Adapter II SlimLine (if one is present)
d. (Trained service technician only) System board
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DR550 Version 4.5 Problem Determination and Service Guide