Network Connection Problems; Ethernet Controller Troubleshooting Chart - IBM IntelliStation M Pro Hardware Maintenance Manual

You can use the Ethernet wrap test to determine whether a hardware problem is
causing the Ethernet connection to fail. To perform the Ethernet wrap test, use the
wrap plug (FRU 60G3981) with the diagnostic tests.
If this testing method indicates that the hardware is functioning normally but the
problem remains, see "Network connection problems" or inform the network
administrator.

Network connection problems

If the Ethernet controller cannot connect to the network, check the following
conditions:
v Make sure that the cable is installed correctly.
v Determine whether the hub supports auto-negotiation. If it does not, try
v Check the Ethernet controller LEDs on the rear of the computer.
v Make sure that you are using the correct device drivers, which are supplied with
v Check for operating-system-specific causes for the problem.
v Make sure that the device drivers on the client and computer are using the same

Ethernet controller troubleshooting chart

Use the following troubleshooting chart to find solutions to 10/100/1000 Mbps
Ethernet controller problems that have definite symptoms.
Ethernet controller
problem
The computer stopped
running when loading
device drivers.
Ethernet link status LED
does not work.
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IBM IntelliStation M Pro Types 6220 and 6230: Hardware Maintenance Manual
The network cable must be securely attached at all connections. If the cable is
attached but the problem remains, try a different cable.
If you set the Ethernet controller to operate at either 100 Mbps or 1000 Mbps,
you must use Category 5 or higher cabling.
configuring the integrated Ethernet controller manually to match the speed and
duplex mode of the hub.
The Ethernet link status LED, on the rear of the computer, is lit when the
Ethernet controller receives a LINK pulse from the hub. If the LED is off, there
might be a defective connector or cable or a problem with the hub.
the computer.
protocol.
FRU/actions
The PCI BIOS interrupt settings are incorrect.
v Determine whether the interrupt (IRQ) setting assigned to the Ethernet controller 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 controller or the other device. For example, for NetWare
Versions 3 and 4, it is recommended that disk controllers not share interrupts with LAN
controllers.
v Make sure that you are using the most recent device driver available from the World
Wide Web.
v Reseat or replace the adapter.
v Make sure that the hub is turned on.
v Check all connections at the Ethernet controller and the hub.
v Use another port on the hub.
v If the hub does not support auto-negotiation, manually configure the Ethernet controller
to match the hub.
v If you manually configured the duplex mode, make sure that you also manually configure
the speed.
v Reseat or replace the adapter.