IBM 306m - eServer xSeries - 8849, Service Manual

Page: 50 / 142

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 Chapter 3, “Parts listing, Type 8849 or Type 8491 server,” on page 61 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 present) is seated correctly.
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
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 “Internal LEDs,
connectors, and jumpers” on page 5).
2. Reseat the following components:
a. Failing serial device
b. Serial cable
c. Remote Supervisor Adapter II (if one is present)
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 (if one is present)
d. (Trained service technician only) System board
ServerGuide 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 Chapter 3, “Parts listing, Type 8849 or Type 8491 server,” on page 61 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 ServerGuide
™
Setup and
Installation CD will not start.
1. Make sure that the server supports the ServerGuide program and has a
startable (bootable) CD or DVD drive.
2. If the startup (boot) sequence settings have been changed, make sure that the
CD or DVD drive is first in the startup sequence.
3. If more than one CD or DVD drive is installed, make sure that only one drive is
set as the primary drive. Start the CD from the primary drive.
34
IBM xSeries 306m Types 8849 and 8491: Problem Determination and Service Guide