IBM 8669 Hardware Maintenance Manual - Page 29

Power checkout, Replacing the battery

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Table 1. Ethernet troubleshooting chart (continued) Ethernet controller problem Suggested Action The Ethernet controller Check the following: stopped working when v Make sure that the cable is connected to the Ethernet controller. another adapter was added to v Make sure that the PCI system BIOS is current. the server. v Reseat the adapter. v Determine if the interrupt (IRQ) setting assigned to the Ethernet adapter is also assigned to another device in the Configuration/Setup Utility program. Although interrupt sharing is allowed for PCI devices, some devices do not function well when they share an interrupt with a dissimilar PCI device. Try changing the IRQ assigned to the Ethernet adapter or the other device. The Ethernet controller stopped working without apparent cause. If the problem remains, go to "Starting the diagnostic programs" on page 15 to run the diagnostic programs. Check the following: v Run diagnostics for the Ethernet controller. v Try a different connector on the hub. v Reinstall the device drivers. Refer to the operating-system documentation and to the ServerGuide information. If the problem remains, go to "Starting the diagnostic programs" on page 15 to run the diagnostic programs. Power checkout Power problems can be difficult to troubleshoot. For instance, a short circuit can exist anywhere on any of the power distribution busses. Usually a short circuit will cause the power subsystem to shut down because of an overcurrent condition. A general procedure for troubleshooting power problems is as follows: 1. Power off the system and disconnect the AC cord(s). 2. Check for loose cables in the power subsystem. Also check for short circuits, for instance if there is a loose screw causing a short circuit on a circuit board. 3. Remove adapters and disconnect the cables and power connectors to all internal and external devices until system is at minimum configuration required for power on (see ″Minimum operating requirements″ on page 103). 4. Reconnect the AC cord and power on the system. If the system powers up successfully, replace adapters and devices one at a time until the problem is isolated. If system does not power up from minimal configuration, replace FRUs of minimal configuration one at a time until the problem is isolated. To use this method it is important to know the minimum configuration required for a system to power up (see page 103). For specific problems, see "Power error messages" on page 100. Replacing the battery When replacing the battery, you must replace it with a lithium battery of the same type from the same manufacturer. To avoid possible danger, read and follow the safety statement below. To order replacement batteries, call 1-800-772-2227 within the United States, and 1-800-465-7999 or 1-800-465-6666 within Canada. Outside the U.S. and Canada, call your IBM reseller or IBM marketing representative. Diagnostics 19

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Table 1. Ethernet troubleshooting chart (continued)
Ethernet controller problem
Suggested Action
The Ethernet controller
stopped working when
another adapter was added to
the server.
Check the following:
v
Make sure that the cable is connected to the Ethernet controller.
v
Make sure that the PCI system BIOS is current.
v
Reseat the adapter.
v
Determine if the interrupt (IRQ) setting assigned to the Ethernet adapter is also
assigned to another device in the Configuration/Setup Utility program.
Although interrupt sharing is allowed for PCI devices, some devices do not function
well when they share an interrupt with a dissimilar PCI device. Try changing the
IRQ assigned to the Ethernet adapter or the other device.
If the problem remains, go to “Starting the diagnostic programs” on page 15 to run
the diagnostic programs.
The Ethernet controller
stopped working without
apparent cause.
Check the following:
v
Run diagnostics for the Ethernet controller.
v
Try a different connector on the hub.
v
Reinstall the device drivers. Refer to the operating-system documentation and to
the ServerGuide information.
If the problem remains, go to “Starting the diagnostic programs” on page 15 to run
the diagnostic programs.
Power checkout
Power problems can be difficult to troubleshoot. For instance, a short circuit can
exist anywhere on any of the power distribution busses. Usually a short circuit will
cause the power subsystem to shut down because of an overcurrent condition.
A general procedure for troubleshooting power problems is as follows:
1.
Power off the system and disconnect the AC cord(s).
2.
Check for loose cables in the power subsystem. Also check for short circuits, for
instance if there is a loose screw causing a short circuit on a circuit board.
3.
Remove adapters and disconnect the cables and power connectors to all
internal and external devices until system is at minimum configuration required
for power on (see
″
Minimum operating requirements
″
on page 103).
4.
Reconnect the AC cord and power on the system. If the system powers up
successfully, replace adapters and devices one at a time until the problem is
isolated. If system does not power up from minimal configuration, replace FRUs
of minimal configuration one at a time until the problem is isolated.
To use this method it is important to know the minimum configuration required for a
system to power up (see page 103). For specific problems, see “Power error
messages” on page 100.
Replacing the battery
When replacing the battery, you must replace it with a lithium battery of the same
type from the same manufacturer. To avoid possible danger, read and follow the
safety statement below.
To order replacement batteries, call 1-800-772-2227 within the United States, and
1-800-465-7999 or 1-800-465-6666 within Canada. Outside the U.S. and Canada,
call your IBM reseller or IBM marketing representative.
Diagnostics
19