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v Determine whether the hub supports auto-negotiation. If it does not, try
v Check the Ethernet controller LEDs on the rear panel of the server. These LEDs
v Check the Ethernet activity LED on the rear of the server. The Ethernet activity
v Check for operating-system-specific causes of the problem.
v Make sure that the device drivers on the client and server are using the same
If the Ethernet controller still cannot connect to the network but the hardware
appears to be working, the network administrator must investigate other possible
causes of the error.
Solving undetermined problems
If the diagnostic tests did not diagnose the failure or if the server is inoperative, use
the information in this section.
If you suspect that a software problem is causing failures (continuous or
intermittent), see "Software problems" on page 53.
Damaged data in CMOS memory or damaged server firmware can cause
undetermined problems. To reset the CMOS data, use the CMOS switch to clear
the CMOS memory; see "System-board jumpers" on page 18. If you suspect that
the server firmware is damaged, see "Recovering the server firmware" on page 89.
Check the LEDs on all the power supplies (see "Power-supply LEDs" on page 58).
If the LEDs indicate that the power supplies are working correctly, complete the
following steps:
1. Turn off the server.
2. Make sure that the server is cabled correctly.
3. Remove or disconnect the following devices, one at a time, until you find the
– The cable must be securely attached at all connections. If the cable is
attached but the problem remains, try a different cable.
– You must use Category 5 cabling.
configuring the integrated Ethernet controller manually to match the speed and
duplex mode of the hub.
indicate whether there is a problem with the connector, cable, or hub.
– The Ethernet link status LED 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 Ethernet transmit/receive activity LED is lit when the Ethernet controller
sends or receives data over the Ethernet network. If the Ethernet
transmit/receive activity light is off, make sure that the hub and network are
operating and that the correct device drivers are installed.
LED is lit when data is active on the Ethernet network. If the Ethernet activity
LED is off, make sure that the hub and network are operating and that the
correct device drivers are installed.
protocol.
failure. Turn on the server and reconfigure it each time.
v Any external devices.
v Surge-suppressor device (on the server).
v Modem, printer, mouse, and non-IBM devices.
v Each adapter.
v Hard disk drives.
v Memory modules. The minimum configuration requirement is 1 GB DIMM in
connector 3 (see "System-board DIMM connectors" on page 16).
The following minimum configuration is required for the server to start:
v One microprocessor (slot 1)
121
Chapter 3. Diagnostics
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